CoCalc -- head

GitHub Repository: awilliam/linux-vfio
Path: blob/master/arch/sparc/kernel/head_32.S
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/*
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 * head.S: The initial boot code for the Sparc port of Linux.
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 *
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 * Copyright (C) 1995 David S. Miller ([email protected])
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 * Copyright (C) 1995,1999 Pete Zaitcev   ([email protected])
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 * Copyright (C) 1996 Miguel de Icaza ([email protected])
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 * Copyright (C) 1997 Jakub Jelinek   ([email protected])
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 * Copyright (C) 1997 Michael A. Griffith ([email protected])
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 *
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 * CompactPCI platform by Eric Brower, 1999.
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 */
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#include <linux/version.h>
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#include <linux/init.h>
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#include <asm/head.h>
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#include <asm/asi.h>
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#include <asm/contregs.h>
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#include <asm/ptrace.h>
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#include <asm/psr.h>
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#include <asm/page.h>
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#include <asm/kdebug.h>
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#include <asm/winmacro.h>
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#include <asm/thread_info.h>	/* TI_UWINMASK */
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#include <asm/errno.h>
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#include <asm/pgtsrmmu.h>	/* SRMMU_PGDIR_SHIFT */
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	.data
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/* 
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 * The following are used with the prom_vector node-ops to figure out
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 * the cpu-type 
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 */
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	.align 4
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cputyp:
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        .word   1
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	.align 4
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	.globl cputypval
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cputypval:
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	.asciz "sun4c"
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	.ascii "     "
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cputypvalend:
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cputypvallen = cputypvar - cputypval
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	.align 4
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/*
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 * Sun people can't spell worth damn. "compatability" indeed.
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 * At least we *know* we can't spell, and use a spell-checker.
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 */
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/* Uh, actually Linus it is I who cannot spell. Too much murky
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 * Sparc assembly will do this to ya.
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 */
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cputypvar:
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	.asciz "compatability"
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/* Tested on SS-5, SS-10. Probably someone at Sun applied a spell-checker. */
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	.align 4
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cputypvar_sun4m:
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	.asciz "compatible"
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	.align 4
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sun4_notsup:
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	.asciz	"Sparc-Linux sun4 support does no longer exist.\n\n"
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	.align 4
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sun4e_notsup:
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        .asciz  "Sparc-Linux sun4e support does not exist\n\n"
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	.align 4
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	/* The Sparc trap table, bootloader gives us control at _start. */
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	__HEAD
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	.globl	_stext, _start, __stext
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	.globl  trapbase
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_start:   /* danger danger */
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__stext:
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_stext:
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trapbase:
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#ifdef CONFIG_SMP
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trapbase_cpu0:
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#endif
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/* We get control passed to us here at t_zero. */
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t_zero:	b gokernel; nop; nop; nop;
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t_tflt:	SPARC_TFAULT                        /* Inst. Access Exception        */
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t_bins:	TRAP_ENTRY(0x2, bad_instruction)    /* Illegal Instruction           */
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t_pins:	TRAP_ENTRY(0x3, priv_instruction)   /* Privileged Instruction        */
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t_fpd:	TRAP_ENTRY(0x4, fpd_trap_handler)   /* Floating Point Disabled       */
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t_wovf:	WINDOW_SPILL                        /* Window Overflow               */
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t_wunf:	WINDOW_FILL                         /* Window Underflow              */
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t_mna:	TRAP_ENTRY(0x7, mna_handler)        /* Memory Address Not Aligned    */
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t_fpe:	TRAP_ENTRY(0x8, fpe_trap_handler)   /* Floating Point Exception      */
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t_dflt:	SPARC_DFAULT                        /* Data Miss Exception           */
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t_tio:	TRAP_ENTRY(0xa, do_tag_overflow)    /* Tagged Instruction Ovrflw     */
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t_wpt:	TRAP_ENTRY(0xb, do_watchpoint)      /* Watchpoint Detected           */
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t_badc:	BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
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t_irq1:	TRAP_ENTRY_INTERRUPT(1)             /* IRQ Software/SBUS Level 1     */
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t_irq2:	TRAP_ENTRY_INTERRUPT(2)             /* IRQ SBUS Level 2              */
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t_irq3:	TRAP_ENTRY_INTERRUPT(3)             /* IRQ SCSI/DMA/SBUS Level 3     */
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t_irq4:	TRAP_ENTRY_INTERRUPT(4)             /* IRQ Software Level 4          */
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t_irq5:	TRAP_ENTRY_INTERRUPT(5)             /* IRQ SBUS/Ethernet Level 5     */
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t_irq6:	TRAP_ENTRY_INTERRUPT(6)             /* IRQ Software Level 6          */
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t_irq7:	TRAP_ENTRY_INTERRUPT(7)             /* IRQ Video/SBUS Level 5        */
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t_irq8:	TRAP_ENTRY_INTERRUPT(8)             /* IRQ SBUS Level 6              */
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t_irq9:	TRAP_ENTRY_INTERRUPT(9)             /* IRQ SBUS Level 7              */
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t_irq10:TRAP_ENTRY_INTERRUPT(10)            /* IRQ Timer #1 (one we use)     */
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t_irq11:TRAP_ENTRY_INTERRUPT(11)            /* IRQ Floppy Intr.              */
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t_irq12:TRAP_ENTRY_INTERRUPT(12)            /* IRQ Zilog serial chip         */
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t_irq13:TRAP_ENTRY_INTERRUPT(13)            /* IRQ Audio Intr.               */
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t_irq14:TRAP_ENTRY_INTERRUPT(14)            /* IRQ Timer #2                  */
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	.globl	t_nmi
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#ifndef CONFIG_SMP
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t_nmi:	NMI_TRAP                            /* Level 15 (NMI)                */
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#else
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t_nmi:	TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
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#endif
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t_racc:	TRAP_ENTRY(0x20, do_reg_access)     /* General Register Access Error */
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t_iacce:BAD_TRAP(0x21)                      /* Instr Access Error            */
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t_bad22:BAD_TRAP(0x22) BAD_TRAP(0x23)
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t_cpdis:TRAP_ENTRY(0x24, do_cp_disabled)    /* Co-Processor Disabled         */
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t_uflsh:SKIP_TRAP(0x25, unimp_flush)        /* Unimplemented FLUSH inst.     */
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t_bad26:BAD_TRAP(0x26) BAD_TRAP(0x27)
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t_cpexc:TRAP_ENTRY(0x28, do_cp_exception)   /* Co-Processor Exception        */
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t_dacce:SPARC_DFAULT                        /* Data Access Error             */
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t_hwdz:	TRAP_ENTRY(0x2a, do_hw_divzero)     /* Division by zero, you lose... */
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t_dserr:BAD_TRAP(0x2b)                      /* Data Store Error              */
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t_daccm:BAD_TRAP(0x2c)                      /* Data Access MMU-Miss          */
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t_bad2d:BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
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t_bad32:BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
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t_bad37:BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
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t_iaccm:BAD_TRAP(0x3c)                      /* Instr Access MMU-Miss         */
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t_bad3d:BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40) BAD_TRAP(0x41)
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t_bad42:BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45) BAD_TRAP(0x46)
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t_bad47:BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a) BAD_TRAP(0x4b)
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t_bad4c:BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f) BAD_TRAP(0x50)
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t_bad51:BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
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t_bad56:BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
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t_bad5b:BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
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t_bad60:BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
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t_bad65:BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
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t_bad6a:BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
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t_bad6f:BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
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t_bad74:BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
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t_bad79:BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
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t_bad7e:BAD_TRAP(0x7e) BAD_TRAP(0x7f)
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t_bad80:BAD_TRAP(0x80)                      /* SunOS System Call             */
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t_sbkpt:BREAKPOINT_TRAP                     /* Software Breakpoint/KGDB      */
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t_divz:	TRAP_ENTRY(0x82, do_hw_divzero)     /* Divide by zero trap           */
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t_flwin:TRAP_ENTRY(0x83, do_flush_windows)  /* Flush Windows Trap            */
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t_clwin:BAD_TRAP(0x84)                      /* Clean Windows Trap            */
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t_rchk:	BAD_TRAP(0x85)                      /* Range Check                   */
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t_funal:BAD_TRAP(0x86)                      /* Fix Unaligned Access Trap     */
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t_iovf:	BAD_TRAP(0x87)                      /* Integer Overflow Trap         */
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t_bad88:BAD_TRAP(0x88)                      /* Slowaris System Call          */
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t_bad89:BAD_TRAP(0x89)                      /* Net-B.S. System Call          */
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t_bad8a:BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c) BAD_TRAP(0x8d) BAD_TRAP(0x8e)
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t_bad8f:BAD_TRAP(0x8f)
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t_linux:LINUX_SYSCALL_TRAP                  /* Linux System Call             */
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t_bad91:BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94) BAD_TRAP(0x95)
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t_bad96:BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99) BAD_TRAP(0x9a)
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t_bad9b:BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e) BAD_TRAP(0x9f)
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t_getcc:GETCC_TRAP                          /* Get Condition Codes           */
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t_setcc:SETCC_TRAP                          /* Set Condition Codes           */
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t_getpsr:GETPSR_TRAP                        /* Get PSR Register              */
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t_bada3:BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
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t_bada7:BAD_TRAP(0xa7)
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t_bada8:BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
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t_badac:BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
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t_badb1:BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
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t_badb6:BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
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t_badbb:BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
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t_badc0:BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
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t_badc5:BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
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t_badca:BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
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t_badcf:BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
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t_badd4:BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
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t_badd9:BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
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t_badde:BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
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t_bade3:BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
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t_bade8:BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
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t_baded:BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
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t_badf2:BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
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t_badf7:BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
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t_badfc:BAD_TRAP(0xfc)
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t_kgdb:	KGDB_TRAP(0xfd)
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dbtrap:	BAD_TRAP(0xfe)                      /* Debugger/PROM breakpoint #1   */
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dbtrap2:BAD_TRAP(0xff)                      /* Debugger/PROM breakpoint #2   */	
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	.globl	end_traptable
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end_traptable:
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#ifdef CONFIG_SMP
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	/* Trap tables for the other cpus. */
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	.globl	trapbase_cpu1, trapbase_cpu2, trapbase_cpu3
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trapbase_cpu1:
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	BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
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	TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
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	WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
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	TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
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	TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
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	BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
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	TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
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	TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
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	TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
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	TRAP_ENTRY_INTERRUPT(7)	TRAP_ENTRY_INTERRUPT(8)
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	TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
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	TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
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	TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
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	TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
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	TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
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	BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
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	BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
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	SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
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	BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
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	BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
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	BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
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	BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
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	BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
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	BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
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	BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
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	BAD_TRAP(0x50)
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	BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
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	BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
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	BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
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	BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
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	BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
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	BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
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	BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
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	BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
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	BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
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	BAD_TRAP(0x7e) BAD_TRAP(0x7f)
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	BAD_TRAP(0x80)
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	BREAKPOINT_TRAP
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	TRAP_ENTRY(0x82, do_hw_divzero)
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	TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
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	BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
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	BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
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	BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
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	LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
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	BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
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	BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
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	BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
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	BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
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	BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
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	BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
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	BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
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	BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
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	BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
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	BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
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	BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
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	BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
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	BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
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	BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
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	BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
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	BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
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	BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
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	BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
260
	BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
261
	BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
262
	BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
263
	BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
264

265
trapbase_cpu2:
266
	BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
267
	TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
268
	WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
269
	TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
270
	TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
271
	BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
272
	TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
273
	TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
274
	TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
275
	TRAP_ENTRY_INTERRUPT(7)	TRAP_ENTRY_INTERRUPT(8)
276
	TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
277
	TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
278
	TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
279
	TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
280
	TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
281
	BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
282
	BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
283
	SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
284
	BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
285
	BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
286
	BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
287
	BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
288
	BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
289
	BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
290
	BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
291
	BAD_TRAP(0x50)
292
	BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
293
	BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
294
	BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
295
	BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
296
	BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
297
	BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
298
	BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
299
	BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
300
	BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
301
	BAD_TRAP(0x7e) BAD_TRAP(0x7f)
302
	BAD_TRAP(0x80)
303
	BREAKPOINT_TRAP
304
	TRAP_ENTRY(0x82, do_hw_divzero)
305
	TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
306
	BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
307
	BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
308
	BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
309
	LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
310
	BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
311
	BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
312
	BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
313
	BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
314
	BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
315
	BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
316
	BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
317
	BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
318
	BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
319
	BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
320
	BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
321
	BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
322
	BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
323
	BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
324
	BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
325
	BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
326
	BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
327
	BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
328
	BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
329
	BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
330
	BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
331
	BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
332

333
trapbase_cpu3:
334
	BAD_TRAP(0x0) SRMMU_TFAULT TRAP_ENTRY(0x2, bad_instruction)
335
	TRAP_ENTRY(0x3, priv_instruction) TRAP_ENTRY(0x4, fpd_trap_handler)
336
	WINDOW_SPILL WINDOW_FILL TRAP_ENTRY(0x7, mna_handler)
337
	TRAP_ENTRY(0x8, fpe_trap_handler) SRMMU_DFAULT
338
	TRAP_ENTRY(0xa, do_tag_overflow) TRAP_ENTRY(0xb, do_watchpoint)
339
	BAD_TRAP(0xc) BAD_TRAP(0xd) BAD_TRAP(0xe) BAD_TRAP(0xf) BAD_TRAP(0x10)
340
	TRAP_ENTRY_INTERRUPT(1) TRAP_ENTRY_INTERRUPT(2)
341
	TRAP_ENTRY_INTERRUPT(3) TRAP_ENTRY_INTERRUPT(4)
342
	TRAP_ENTRY_INTERRUPT(5) TRAP_ENTRY_INTERRUPT(6)
343
	TRAP_ENTRY_INTERRUPT(7)	TRAP_ENTRY_INTERRUPT(8)
344
	TRAP_ENTRY_INTERRUPT(9) TRAP_ENTRY_INTERRUPT(10)
345
	TRAP_ENTRY_INTERRUPT(11) TRAP_ENTRY_INTERRUPT(12)
346
	TRAP_ENTRY_INTERRUPT(13) TRAP_ENTRY_INTERRUPT(14)
347
	TRAP_ENTRY(0x1f, linux_trap_ipi15_sun4m)
348
	TRAP_ENTRY(0x20, do_reg_access) BAD_TRAP(0x21) BAD_TRAP(0x22)
349
	BAD_TRAP(0x23) TRAP_ENTRY(0x24, do_cp_disabled) SKIP_TRAP(0x25, unimp_flush)
350
	BAD_TRAP(0x26) BAD_TRAP(0x27) TRAP_ENTRY(0x28, do_cp_exception)
351
	SRMMU_DFAULT TRAP_ENTRY(0x2a, do_hw_divzero) BAD_TRAP(0x2b) BAD_TRAP(0x2c)
352
	BAD_TRAP(0x2d) BAD_TRAP(0x2e) BAD_TRAP(0x2f) BAD_TRAP(0x30) BAD_TRAP(0x31)
353
	BAD_TRAP(0x32) BAD_TRAP(0x33) BAD_TRAP(0x34) BAD_TRAP(0x35) BAD_TRAP(0x36)
354
	BAD_TRAP(0x37) BAD_TRAP(0x38) BAD_TRAP(0x39) BAD_TRAP(0x3a) BAD_TRAP(0x3b)
355
	BAD_TRAP(0x3c) BAD_TRAP(0x3d) BAD_TRAP(0x3e) BAD_TRAP(0x3f) BAD_TRAP(0x40)
356
	BAD_TRAP(0x41) BAD_TRAP(0x42) BAD_TRAP(0x43) BAD_TRAP(0x44) BAD_TRAP(0x45)
357
	BAD_TRAP(0x46) BAD_TRAP(0x47) BAD_TRAP(0x48) BAD_TRAP(0x49) BAD_TRAP(0x4a)
358
	BAD_TRAP(0x4b) BAD_TRAP(0x4c) BAD_TRAP(0x4d) BAD_TRAP(0x4e) BAD_TRAP(0x4f)
359
	BAD_TRAP(0x50)
360
	BAD_TRAP(0x51) BAD_TRAP(0x52) BAD_TRAP(0x53) BAD_TRAP(0x54) BAD_TRAP(0x55)
361
	BAD_TRAP(0x56) BAD_TRAP(0x57) BAD_TRAP(0x58) BAD_TRAP(0x59) BAD_TRAP(0x5a)
362
	BAD_TRAP(0x5b) BAD_TRAP(0x5c) BAD_TRAP(0x5d) BAD_TRAP(0x5e) BAD_TRAP(0x5f)
363
	BAD_TRAP(0x60) BAD_TRAP(0x61) BAD_TRAP(0x62) BAD_TRAP(0x63) BAD_TRAP(0x64)
364
	BAD_TRAP(0x65) BAD_TRAP(0x66) BAD_TRAP(0x67) BAD_TRAP(0x68) BAD_TRAP(0x69)
365
	BAD_TRAP(0x6a) BAD_TRAP(0x6b) BAD_TRAP(0x6c) BAD_TRAP(0x6d) BAD_TRAP(0x6e)
366
	BAD_TRAP(0x6f) BAD_TRAP(0x70) BAD_TRAP(0x71) BAD_TRAP(0x72) BAD_TRAP(0x73)
367
	BAD_TRAP(0x74) BAD_TRAP(0x75) BAD_TRAP(0x76) BAD_TRAP(0x77) BAD_TRAP(0x78)
368
	BAD_TRAP(0x79) BAD_TRAP(0x7a) BAD_TRAP(0x7b) BAD_TRAP(0x7c) BAD_TRAP(0x7d)
369
	BAD_TRAP(0x7e) BAD_TRAP(0x7f)
370
	BAD_TRAP(0x80)
371
	BREAKPOINT_TRAP
372
	TRAP_ENTRY(0x82, do_hw_divzero)
373
	TRAP_ENTRY(0x83, do_flush_windows) BAD_TRAP(0x84) BAD_TRAP(0x85)
374
	BAD_TRAP(0x86) BAD_TRAP(0x87) BAD_TRAP(0x88)
375
	BAD_TRAP(0x89) BAD_TRAP(0x8a) BAD_TRAP(0x8b) BAD_TRAP(0x8c)
376
	BAD_TRAP(0x8d) BAD_TRAP(0x8e) BAD_TRAP(0x8f)
377
	LINUX_SYSCALL_TRAP BAD_TRAP(0x91) BAD_TRAP(0x92) BAD_TRAP(0x93) BAD_TRAP(0x94)
378
	BAD_TRAP(0x95) BAD_TRAP(0x96) BAD_TRAP(0x97) BAD_TRAP(0x98) BAD_TRAP(0x99)
379
	BAD_TRAP(0x9a) BAD_TRAP(0x9b) BAD_TRAP(0x9c) BAD_TRAP(0x9d) BAD_TRAP(0x9e)
380
	BAD_TRAP(0x9f) GETCC_TRAP SETCC_TRAP GETPSR_TRAP
381
	BAD_TRAP(0xa3) BAD_TRAP(0xa4) BAD_TRAP(0xa5) BAD_TRAP(0xa6)
382
	BAD_TRAP(0xa7) BAD_TRAP(0xa8) BAD_TRAP(0xa9) BAD_TRAP(0xaa) BAD_TRAP(0xab)
383
	BAD_TRAP(0xac) BAD_TRAP(0xad) BAD_TRAP(0xae) BAD_TRAP(0xaf) BAD_TRAP(0xb0)
384
	BAD_TRAP(0xb1) BAD_TRAP(0xb2) BAD_TRAP(0xb3) BAD_TRAP(0xb4) BAD_TRAP(0xb5)
385
	BAD_TRAP(0xb6) BAD_TRAP(0xb7) BAD_TRAP(0xb8) BAD_TRAP(0xb9) BAD_TRAP(0xba)
386
	BAD_TRAP(0xbb) BAD_TRAP(0xbc) BAD_TRAP(0xbd) BAD_TRAP(0xbe) BAD_TRAP(0xbf)
387
	BAD_TRAP(0xc0) BAD_TRAP(0xc1) BAD_TRAP(0xc2) BAD_TRAP(0xc3) BAD_TRAP(0xc4)
388
	BAD_TRAP(0xc5) BAD_TRAP(0xc6) BAD_TRAP(0xc7) BAD_TRAP(0xc8) BAD_TRAP(0xc9)
389
	BAD_TRAP(0xca) BAD_TRAP(0xcb) BAD_TRAP(0xcc) BAD_TRAP(0xcd) BAD_TRAP(0xce)
390
	BAD_TRAP(0xcf) BAD_TRAP(0xd0) BAD_TRAP(0xd1) BAD_TRAP(0xd2) BAD_TRAP(0xd3)
391
	BAD_TRAP(0xd4) BAD_TRAP(0xd5) BAD_TRAP(0xd6) BAD_TRAP(0xd7) BAD_TRAP(0xd8)
392
	BAD_TRAP(0xd9) BAD_TRAP(0xda) BAD_TRAP(0xdb) BAD_TRAP(0xdc) BAD_TRAP(0xdd)
393
	BAD_TRAP(0xde) BAD_TRAP(0xdf) BAD_TRAP(0xe0) BAD_TRAP(0xe1) BAD_TRAP(0xe2)
394
	BAD_TRAP(0xe3) BAD_TRAP(0xe4) BAD_TRAP(0xe5) BAD_TRAP(0xe6) BAD_TRAP(0xe7)
395
	BAD_TRAP(0xe8) BAD_TRAP(0xe9) BAD_TRAP(0xea) BAD_TRAP(0xeb) BAD_TRAP(0xec)
396
	BAD_TRAP(0xed) BAD_TRAP(0xee) BAD_TRAP(0xef) BAD_TRAP(0xf0) BAD_TRAP(0xf1)
397
	BAD_TRAP(0xf2) BAD_TRAP(0xf3) BAD_TRAP(0xf4) BAD_TRAP(0xf5) BAD_TRAP(0xf6)
398
	BAD_TRAP(0xf7) BAD_TRAP(0xf8) BAD_TRAP(0xf9) BAD_TRAP(0xfa) BAD_TRAP(0xfb)
399
	BAD_TRAP(0xfc) KGDB_TRAP(0xfd) BAD_TRAP(0xfe) BAD_TRAP(0xff)
400

401
#endif
402
	.align PAGE_SIZE
403

404
/* This was the only reasonable way I could think of to properly align
405
 * these page-table data structures.
406
 */
407
	.globl pg0, pg1, pg2, pg3
408
	.globl empty_bad_page
409
	.globl empty_bad_page_table
410
	.globl empty_zero_page
411
	.globl swapper_pg_dir
412
swapper_pg_dir:		.skip PAGE_SIZE
413
pg0:			.skip PAGE_SIZE
414
pg1:			.skip PAGE_SIZE
415
pg2:			.skip PAGE_SIZE
416
pg3:			.skip PAGE_SIZE
417
empty_bad_page:		.skip PAGE_SIZE
418
empty_bad_page_table:	.skip PAGE_SIZE
419
empty_zero_page:	.skip PAGE_SIZE
420

421
	.global root_flags
422
	.global ram_flags
423
	.global root_dev
424
	.global sparc_ramdisk_image
425
	.global sparc_ramdisk_size
426

427
/* This stuff has to be in sync with SILO and other potential boot loaders
428
 * Fields should be kept upward compatible and whenever any change is made,
429
 * HdrS version should be incremented.
430
 */
431
	.ascii	"HdrS"
432
	.word	LINUX_VERSION_CODE
433
	.half	0x0203		/* HdrS version */
434
root_flags:
435
	.half	1
436
root_dev:
437
	.half	0
438
ram_flags:
439
	.half	0
440
sparc_ramdisk_image:
441
	.word	0
442
sparc_ramdisk_size:
443
	.word	0
444
	.word	reboot_command
445
	.word	0, 0, 0
446
	.word	_end
447

448
/* Cool, here we go. Pick up the romvec pointer in %o0 and stash it in
449
 * %g7 and at prom_vector_p. And also quickly check whether we are on
450
 * a v0, v2, or v3 prom.
451
 */
452
gokernel:
453
		/* Ok, it's nice to know, as early as possible, if we
454
		 * are already mapped where we expect to be in virtual
455
		 * memory.  The Solaris /boot elf format bootloader
456
		 * will peek into our elf header and load us where
457
		 * we want to be, otherwise we have to re-map.
458
		 *
459
		 * Some boot loaders don't place the jmp'rs address
460
		 * in %o7, so we do a pc-relative call to a local
461
		 * label, then see what %o7 has.
462
		 */
463

464
		mov	%o7, %g4		! Save %o7
465

466
		/* Jump to it, and pray... */
467
current_pc:
468
		call	1f
469
		 nop
470

471
1:
472
		mov	%o7, %g3
473

474
		tst	%o0
475
		be	no_sun4u_here
476
		 mov	%g4, %o7		/* Previous %o7. */
477
	
478
		mov	%o0, %l0		! stash away romvec
479
		mov	%o0, %g7		! put it here too
480
		mov	%o1, %l1		! stash away debug_vec too
481

482
		/* Ok, let's check out our run time program counter. */
483
		set	current_pc, %g5
484
		cmp	%g3, %g5
485
		be	already_mapped
486
		 nop 
487

488
		/* %l6 will hold the offset we have to subtract
489
		 * from absolute symbols in order to access areas
490
		 * in our own image.  If already mapped this is
491
		 * just plain zero, else it is KERNBASE.
492
		 */
493
		set	KERNBASE, %l6
494
		b	copy_prom_lvl14
495
		 nop
496

497
already_mapped:
498
		mov	0, %l6
499

500
		/* Copy over the Prom's level 14 clock handler. */
501
copy_prom_lvl14:
502
#if 1
503
		/* DJHR
504
		 * preserve our linked/calculated instructions
505
		 */
506
		set	lvl14_save, %g1
507
		set	t_irq14, %g3
508
		sub	%g1, %l6, %g1		! translate to physical
509
		sub	%g3, %l6, %g3		! translate to physical
510
		ldd	[%g3], %g4
511
		std	%g4, [%g1]
512
		ldd	[%g3+8], %g4
513
		std	%g4, [%g1+8]
514
#endif
515
		rd	%tbr, %g1
516
		andn	%g1, 0xfff, %g1		! proms trap table base
517
		or	%g0, (0x1e<<4), %g2	! offset to lvl14 intr
518
		or	%g1, %g2, %g2
519
		set	t_irq14, %g3
520
		sub	%g3, %l6, %g3
521
		ldd	[%g2], %g4
522
		std	%g4, [%g3]
523
		ldd	[%g2 + 0x8], %g4
524
		std	%g4, [%g3 + 0x8]	! Copy proms handler
525

526
/* Must determine whether we are on a sun4c MMU, SRMMU, or SUN4/400 MUTANT
527
 * MMU so we can remap ourselves properly.  DON'T TOUCH %l0 thru %l5 in these
528
 * remapping routines, we need their values afterwards!
529
 */
530
		/* Now check whether we are already mapped, if we
531
		 * are we can skip all this garbage coming up.
532
		 */
533
copy_prom_done:
534
		cmp	%l6, 0
535
		be	go_to_highmem		! this will be a nop then
536
		 nop
537

538
		set	LOAD_ADDR, %g6
539
		cmp	%g7, %g6
540
		bne	remap_not_a_sun4	! This is not a Sun4
541
		 nop
542

543
		or	%g0, 0x1, %g1
544
		lduba	[%g1] ASI_CONTROL, %g1	! Only safe to try on Sun4.
545
		subcc	%g1, 0x24, %g0		! Is this a mutant Sun4/400???
546
		be	sun4_mutant_remap	! Ugh, it is...
547
		 nop
548

549
		b	sun4_normal_remap	! regular sun4, 2 level mmu
550
		 nop
551

552
remap_not_a_sun4:
553
		lda	[%g0] ASI_M_MMUREGS, %g1 ! same as ASI_PTE on sun4c
554
		and	%g1, 0x1, %g1		! Test SRMMU Enable bit ;-)
555
		cmp	%g1, 0x0
556
		be	sun4c_remap		! A sun4c MMU or normal Sun4
557
		 nop
558
srmmu_remap:
559
		/* First, check for a viking (TI) module. */
560
		set	0x40000000, %g2
561
		rd	%psr, %g3
562
		and	%g2, %g3, %g3
563
		subcc	%g3, 0x0, %g0
564
		bz	srmmu_nviking
565
		 nop
566

567
		/* Figure out what kind of viking we are on.
568
		 * We need to know if we have to play with the
569
		 * AC bit and disable traps or not.
570
		 */
571

572
		/* I've only seen MicroSparc's on SparcClassics with this
573
		 * bit set.
574
		 */
575
		set	0x800, %g2
576
		lda	[%g0] ASI_M_MMUREGS, %g3	! peek in the control reg
577
		and	%g2, %g3, %g3
578
		subcc	%g3, 0x0, %g0
579
		bnz	srmmu_nviking			! is in mbus mode
580
		 nop
581
		
582
		rd	%psr, %g3			! DO NOT TOUCH %g3
583
		andn	%g3, PSR_ET, %g2
584
		wr	%g2, 0x0, %psr
585
		WRITE_PAUSE
586
		
587
		/* Get context table pointer, then convert to
588
		 * a physical address, which is 36 bits.
589
		 */
590
		set	AC_M_CTPR, %g4
591
		lda	[%g4] ASI_M_MMUREGS, %g4
592
		sll	%g4, 0x4, %g4			! We use this below
593
							! DO NOT TOUCH %g4
594

595
		/* Set the AC bit in the Viking's MMU control reg. */
596
		lda	[%g0] ASI_M_MMUREGS, %g5	! DO NOT TOUCH %g5
597
		set	0x8000, %g6			! AC bit mask
598
		or	%g5, %g6, %g6			! Or it in...
599
		sta	%g6, [%g0] ASI_M_MMUREGS	! Close your eyes...
600

601
		/* Grrr, why does it seem like every other load/store
602
		 * on the sun4m is in some ASI space...
603
		 * Fine with me, let's get the pointer to the level 1
604
		 * page table directory and fetch its entry.
605
		 */
606
		lda	[%g4] ASI_M_BYPASS, %o1		! This is a level 1 ptr
607
		srl	%o1, 0x4, %o1			! Clear low 4 bits
608
		sll	%o1, 0x8, %o1			! Make physical
609
		
610
		/* Ok, pull in the PTD. */
611
		lda	[%o1] ASI_M_BYPASS, %o2		! This is the 0x0 16MB pgd
612

613
		/* Calculate to KERNBASE entry. */
614
		add	%o1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %o3		
615

616
		/* Poke the entry into the calculated address. */
617
		sta	%o2, [%o3] ASI_M_BYPASS
618

619
		/* I don't get it Sun, if you engineered all these
620
		 * boot loaders and the PROM (thank you for the debugging
621
		 * features btw) why did you not have them load kernel
622
		 * images up in high address space, since this is necessary
623
		 * for ABI compliance anyways?  Does this low-mapping provide
624
		 * enhanced interoperability?
625
		 *
626
		 * "The PROM is the computer."
627
		 */
628

629
		/* Ok, restore the MMU control register we saved in %g5 */
630
		sta	%g5, [%g0] ASI_M_MMUREGS	! POW... ouch
631

632
		/* Turn traps back on.  We saved it in %g3 earlier. */
633
		wr	%g3, 0x0, %psr			! tick tock, tick tock
634

635
		/* Now we burn precious CPU cycles due to bad engineering. */
636
		WRITE_PAUSE
637

638
		/* Wow, all that just to move a 32-bit value from one
639
		 * place to another...  Jump to high memory.
640
		 */
641
		b	go_to_highmem
642
		 nop
643

644
		/* This works on viking's in Mbus mode and all
645
		 * other MBUS modules.  It is virtually the same as
646
		 * the above madness sans turning traps off and flipping
647
		 * the AC bit.
648
		 */
649
srmmu_nviking:
650
		set	AC_M_CTPR, %g1
651
		lda	[%g1] ASI_M_MMUREGS, %g1	! get ctx table ptr
652
		sll	%g1, 0x4, %g1			! make physical addr
653
		lda	[%g1] ASI_M_BYPASS, %g1		! ptr to level 1 pg_table
654
		srl	%g1, 0x4, %g1
655
		sll	%g1, 0x8, %g1			! make phys addr for l1 tbl
656

657
		lda	[%g1] ASI_M_BYPASS, %g2		! get level1 entry for 0x0
658
		add	%g1, KERNBASE >> (SRMMU_PGDIR_SHIFT - 2), %g3
659
		sta	%g2, [%g3] ASI_M_BYPASS		! place at KERNBASE entry
660
		b	go_to_highmem
661
		 nop					! wheee....
662

663
		/* This remaps the kernel on Sun4/4xx machines
664
		 * that have the Sun Mutant Three Level MMU.
665
		 * It's like a platypus, Sun didn't have the
666
		 * SRMMU in conception so they kludged the three
667
		 * level logic in the regular Sun4 MMU probably.
668
		 *
669
		 * Basically, you take each entry in the top level
670
		 * directory that maps the low 3MB starting at
671
		 * address zero and put the mapping in the KERNBASE
672
		 * slots.  These top level pgd's are called regmaps.
673
		 */
674
sun4_mutant_remap:
675
		or	%g0, %g0, %g3		! source base
676
		sethi	%hi(KERNBASE), %g4	! destination base
677
		or	%g4, %lo(KERNBASE), %g4
678
		sethi	%hi(0x300000), %g5
679
		or	%g5, %lo(0x300000), %g5	! upper bound 3MB
680
		or	%g0, 0x1, %l6
681
		sll	%l6, 24, %l6		! Regmap mapping size
682
		add	%g3, 0x2, %g3		! Base magic
683
		add	%g4, 0x2, %g4		! Base magic
684

685
		/* Main remapping loop on Sun4-Mutant-MMU.
686
		 * "I am not an animal..." -Famous Mutant Person
687
		 */
688
sun4_mutant_loop:
689
		lduha	[%g3] ASI_REGMAP, %g2	! Get lower entry
690
		stha	%g2, [%g4] ASI_REGMAP	! Store in high entry
691
		add	%g4, %l6, %g4		! Move up high memory ptr
692
		subcc	%g3, %g5, %g0		! Reached our limit?
693
		blu	sun4_mutant_loop	! Nope, loop again
694
		 add	%g3, %l6, %g3		! delay, Move up low ptr
695
		b	go_to_highmem		! Jump to high memory.
696
		 nop
697

698
		/* The following is for non-4/4xx sun4 MMU's. */
699
sun4_normal_remap:
700
		mov	0, %g3			! source base
701
		set	KERNBASE, %g4		! destination base
702
		set	0x300000, %g5		! upper bound 3MB
703
		mov	1, %l6
704
		sll	%l6, 18, %l6		! sun4 mmu segmap size
705
sun4_normal_loop:
706
		lduha	[%g3] ASI_SEGMAP, %g6	! load phys_seg
707
		stha	%g6, [%g4] ASI_SEGMAP	! stort new virt mapping
708
		add	%g3, %l6, %g3		! increment source pointer
709
		subcc	%g3, %g5, %g0		! reached limit?
710
		blu	sun4_normal_loop	! nope, loop again
711
		 add	%g4, %l6, %g4		! delay, increment dest ptr
712
		b	go_to_highmem
713
		 nop
714

715
		/* The following works for Sun4c MMU's */
716
sun4c_remap:
717
		mov	0, %g3			! source base
718
		set	KERNBASE, %g4		! destination base
719
		set	0x300000, %g5		! upper bound 3MB
720
		mov	1, %l6
721
		sll	%l6, 18, %l6		! sun4c mmu segmap size
722
sun4c_remap_loop:
723
		lda	[%g3] ASI_SEGMAP, %g6	! load phys_seg
724
		sta	%g6, [%g4] ASI_SEGMAP   ! store new virt mapping
725
		add	%g3, %l6, %g3		! Increment source ptr
726
		subcc	%g3, %g5, %g0		! Reached limit?
727
		bl	sun4c_remap_loop	! Nope, loop again
728
		 add	%g4, %l6, %g4		! delay, Increment dest ptr
729

730
/* Now do a non-relative jump so that PC is in high-memory */
731
go_to_highmem:
732
		set	execute_in_high_mem, %g1
733
		jmpl	%g1, %g0
734
		 nop
735

736
/* The code above should be at beginning and we have to take care about
737
 * short jumps, as branching to .init.text section from .text is usually
738
 * impossible */
739
		__INIT
740
/* Acquire boot time privileged register values, this will help debugging.
741
 * I figure out and store nwindows and nwindowsm1 later on.
742
 */
743
execute_in_high_mem:
744
		mov	%l0, %o0		! put back romvec
745
		mov	%l1, %o1		! and debug_vec
746

747
		sethi	%hi(prom_vector_p), %g1
748
		st	%o0, [%g1 + %lo(prom_vector_p)]
749

750
		sethi	%hi(linux_dbvec), %g1
751
		st	%o1, [%g1 + %lo(linux_dbvec)]
752

753
		ld	[%o0 + 0x4], %o3
754
		and	%o3, 0x3, %o5			! get the version
755

756
		cmp	%o3, 0x2			! a v2 prom?
757
		be	found_version
758
		 nop
759

760
		/* [email protected] */
761
		cmp	%o3, 0x3			! a v3 prom?
762
		be	found_version
763
		 nop
764

765
/* Old sun4's pass our load address into %o0 instead of the prom
766
 * pointer. On sun4's you have to hard code the romvec pointer into
767
 * your code. Sun probably still does that because they don't even
768
 * trust their own "OpenBoot" specifications.
769
 */
770
		set	LOAD_ADDR, %g6
771
		cmp	%o0, %g6		! an old sun4?
772
		be	sun4_init
773
		 nop
774

775
found_version:
776
/* Get the machine type via the mysterious romvec node operations. */
777

778
		add	%g7, 0x1c, %l1		
779
		ld	[%l1], %l0
780
		ld	[%l0], %l0
781
		call 	%l0
782
		 or	%g0, %g0, %o0		! next_node(0) = first_node
783
		or	%o0, %g0, %g6
784

785
		sethi	%hi(cputypvar), %o1	! First node has cpu-arch
786
		or	%o1, %lo(cputypvar), %o1
787
		sethi	%hi(cputypval), %o2	! information, the string
788
		or	%o2, %lo(cputypval), %o2
789
		ld	[%l1], %l0		! 'compatibility' tells
790
		ld	[%l0 + 0xc], %l0	! that we want 'sun4x' where
791
		call	%l0			! x is one of '', 'c', 'm',
792
		 nop				! 'd' or 'e'. %o2 holds pointer
793
						! to a buf where above string
794
						! will get stored by the prom.
795

796
		subcc	%o0, %g0, %g0
797
		bpos	got_prop		! Got the property
798
		 nop
799

800
		or	%g6, %g0, %o0
801
		sethi	%hi(cputypvar_sun4m), %o1
802
		or	%o1, %lo(cputypvar_sun4m), %o1
803
		sethi	%hi(cputypval), %o2
804
		or	%o2, %lo(cputypval), %o2
805
		ld	[%l1], %l0
806
		ld	[%l0 + 0xc], %l0
807
		call	%l0
808
		 nop
809

810
got_prop:
811
#ifdef CONFIG_SPARC_LEON
812
	        /* no cpu-type check is needed, it is a SPARC-LEON */
813

814
		sethi	%hi(boot_cpu_id), %g2	! boot-cpu index
815

816
#ifdef CONFIG_SMP
817
		ldub	[%g2 + %lo(boot_cpu_id)], %g1
818
		cmp	%g1, 0xff		! unset means first CPU
819
		bne	leon_smp_cpu_startup	! continue only with master
820
		 nop
821
#endif
822
		/* Get CPU-ID from most significant 4-bit of ASR17 */
823
		rd     %asr17, %g1
824
		srl    %g1, 28, %g1
825

826
		/* Update boot_cpu_id only on boot cpu */
827
		stub	%g1, [%g2 + %lo(boot_cpu_id)]
828

829
		ba sun4c_continue_boot
830
		 nop
831
#endif
832
		set	cputypval, %o2
833
		ldub	[%o2 + 0x4], %l1
834

835
		cmp	%l1, ' '
836
		be	1f
837
		 cmp	%l1, 'c'
838
		be	1f
839
		 cmp	%l1, 'm'
840
		be	1f
841
		 cmp	%l1, 's'
842
		be	1f
843
		 cmp	%l1, 'd'
844
		be	1f
845
		 cmp	%l1, 'e'
846
		be	no_sun4e_here		! Could be a sun4e.
847
		 nop
848
		b	no_sun4u_here		! AIEEE, a V9 sun4u... Get our BIG BROTHER kernel :))
849
		 nop
850

851
1:		set	cputypval, %l1
852
		ldub	[%l1 + 0x4], %l1
853
		cmp	%l1, 'm'		! Test for sun4d, sun4e ?
854
		be	sun4m_init
855
		 cmp	%l1, 's'		! Treat sun4s as sun4m
856
		be	sun4m_init
857
		 cmp	%l1, 'd'		! Let us see how the beast will die
858
		be	sun4d_init
859
		 nop
860

861
		/* Jump into mmu context zero. */
862
		set	AC_CONTEXT, %g1
863
		stba	%g0, [%g1] ASI_CONTROL
864

865
		b	sun4c_continue_boot
866
		 nop
867

868
/* CPUID in bootbus can be found at PA 0xff0140000 */
869
#define SUN4D_BOOTBUS_CPUID     0xf0140000
870

871
sun4d_init:
872
	/* Need to patch call to handler_irq */
873
	set	patch_handler_irq, %g4
874
	set	sun4d_handler_irq, %g5
875
	sethi	%hi(0x40000000), %g3		! call
876
	sub	%g5, %g4, %g5
877
	srl	%g5, 2, %g5
878
	or	%g5, %g3, %g5
879
	st	%g5, [%g4]
880

881
#ifdef CONFIG_SMP
882
	/* Get our CPU id out of bootbus */
883
	set     SUN4D_BOOTBUS_CPUID, %g3
884
	lduba   [%g3] ASI_M_CTL, %g3
885
	and     %g3, 0xf8, %g3
886
	srl     %g3, 3, %g4
887
	sta     %g4, [%g0] ASI_M_VIKING_TMP1
888
	sethi	%hi(boot_cpu_id), %g5
889
	stb	%g4, [%g5 + %lo(boot_cpu_id)]
890
#endif
891

892
	/* Fall through to sun4m_init */
893

894
sun4m_init:
895
	/* XXX Fucking Cypress... */
896
	lda	[%g0] ASI_M_MMUREGS, %g5
897
	srl	%g5, 28, %g4
898

899
	cmp	%g4, 1
900
	bne	1f
901
	 srl	%g5, 24, %g4
902

903
	and	%g4, 0xf, %g4
904
	cmp	%g4, 7		/* This would be a HyperSparc. */
905

906
	bne	2f
907
	 nop
908

909
1:
910

911
#define PATCH_IT(dst, src)	\
912
	set	(dst), %g5;	\
913
	set	(src), %g4;	\
914
	ld	[%g4], %g3;	\
915
	st	%g3, [%g5];	\
916
	ld	[%g4+0x4], %g3;	\
917
	st	%g3, [%g5+0x4];
918

919
	/* Signed multiply. */
920
	PATCH_IT(.mul, .mul_patch)
921
	PATCH_IT(.mul+0x08, .mul_patch+0x08)
922

923
	/* Signed remainder. */
924
	PATCH_IT(.rem, .rem_patch)
925
	PATCH_IT(.rem+0x08, .rem_patch+0x08)
926
	PATCH_IT(.rem+0x10, .rem_patch+0x10)
927
	PATCH_IT(.rem+0x18, .rem_patch+0x18)
928
	PATCH_IT(.rem+0x20, .rem_patch+0x20)
929
	PATCH_IT(.rem+0x28, .rem_patch+0x28)
930

931
	/* Signed division. */
932
	PATCH_IT(.div, .div_patch)
933
	PATCH_IT(.div+0x08, .div_patch+0x08)
934
	PATCH_IT(.div+0x10, .div_patch+0x10)
935
	PATCH_IT(.div+0x18, .div_patch+0x18)
936
	PATCH_IT(.div+0x20, .div_patch+0x20)
937

938
	/* Unsigned multiply. */
939
	PATCH_IT(.umul, .umul_patch)
940
	PATCH_IT(.umul+0x08, .umul_patch+0x08)
941

942
	/* Unsigned remainder. */
943
	PATCH_IT(.urem, .urem_patch)
944
	PATCH_IT(.urem+0x08, .urem_patch+0x08)
945
	PATCH_IT(.urem+0x10, .urem_patch+0x10)
946
	PATCH_IT(.urem+0x18, .urem_patch+0x18)
947

948
	/* Unsigned division. */
949
	PATCH_IT(.udiv, .udiv_patch)
950
	PATCH_IT(.udiv+0x08, .udiv_patch+0x08)
951
	PATCH_IT(.udiv+0x10, .udiv_patch+0x10)
952

953
#undef PATCH_IT
954

955
/* Ok, the PROM could have done funny things and apple cider could still
956
 * be sitting in the fault status/address registers.  Read them all to
957
 * clear them so we don't get magic faults later on.
958
 */
959
/* This sucks, apparently this makes Vikings call prom panic, will fix later */
960
2:
961
		rd	%psr, %o1
962
		srl	%o1, 28, %o1		! Get a type of the CPU
963

964
		subcc	%o1, 4, %g0		! TI: Viking or MicroSPARC
965
		be	sun4c_continue_boot
966
		 nop
967

968
		set	AC_M_SFSR, %o0
969
		lda	[%o0] ASI_M_MMUREGS, %g0
970
		set	AC_M_SFAR, %o0
971
		lda	[%o0] ASI_M_MMUREGS, %g0
972

973
		/* Fujitsu MicroSPARC-II has no asynchronous flavors of FARs */
974
		subcc	%o1, 0, %g0
975
		be	sun4c_continue_boot
976
		 nop
977

978
		set	AC_M_AFSR, %o0
979
		lda	[%o0] ASI_M_MMUREGS, %g0
980
		set	AC_M_AFAR, %o0
981
		lda	[%o0] ASI_M_MMUREGS, %g0
982
		 nop
983

984

985
sun4c_continue_boot:
986

987

988
/* Aieee, now set PC and nPC, enable traps, give ourselves a stack and it's
989
 * show-time!
990
 */
991

992
		sethi	%hi(cputyp), %o0
993
		st	%g4, [%o0 + %lo(cputyp)]
994

995
		/* Turn on Supervisor, EnableFloating, and all the PIL bits.
996
		 * Also puts us in register window zero with traps off.
997
		 */
998
		set	(PSR_PS | PSR_S | PSR_PIL | PSR_EF), %g2
999
		wr	%g2, 0x0, %psr
1000
		WRITE_PAUSE
1001

1002
		/* I want a kernel stack NOW! */
1003
		set	init_thread_union, %g1
1004
		set	(THREAD_SIZE - STACKFRAME_SZ), %g2
1005
		add	%g1, %g2, %sp
1006
		mov	0, %fp			/* And for good luck */
1007

1008
		/* Zero out our BSS section. */
1009
		set	__bss_start , %o0	! First address of BSS
1010
		set	_end , %o1		! Last address of BSS
1011
		add	%o0, 0x1, %o0
1012
1:	
1013
		stb	%g0, [%o0]
1014
		subcc	%o0, %o1, %g0
1015
		bl	1b
1016
		 add	%o0, 0x1, %o0
1017

1018
		/* If boot_cpu_id has not been setup by machine specific
1019
		 * init-code above we default it to zero.
1020
		 */
1021
		sethi	%hi(boot_cpu_id), %g2
1022
		ldub	[%g2 + %lo(boot_cpu_id)], %g3
1023
		cmp	%g3, 0xff
1024
		bne	1f
1025
		 nop
1026
		mov	%g0, %g3
1027
		stub	%g3, [%g2 + %lo(boot_cpu_id)]
1028

1029
1:		/* boot_cpu_id set. calculate boot_cpu_id4 = boot_cpu_id*4 */
1030
		sll	%g3, 2, %g3
1031
		sethi	%hi(boot_cpu_id4), %g2
1032
		stub	%g3, [%g2 + %lo(boot_cpu_id4)]
1033

1034
		/* Initialize the uwinmask value for init task just in case.
1035
		 * But first make current_set[boot_cpu_id] point to something useful.
1036
		 */
1037
		set	init_thread_union, %g6
1038
		set	current_set, %g2
1039
#ifdef CONFIG_SMP
1040
		st	%g6, [%g2]
1041
		add	%g2, %g3, %g2
1042
#endif
1043
		st	%g6, [%g2]
1044

1045
		st	%g0, [%g6 + TI_UWINMASK]
1046

1047
/* Compute NWINDOWS and stash it away. Now uses %wim trick explained
1048
 * in the V8 manual. Ok, this method seems to work, Sparc is cool...
1049
 * No, it doesn't work, have to play the save/readCWP/restore trick.
1050
 */
1051

1052
		wr	%g0, 0x0, %wim			! so we do not get a trap
1053
		WRITE_PAUSE
1054

1055
		save
1056

1057
		rd	%psr, %g3
1058

1059
		restore
1060

1061
		and	%g3, 0x1f, %g3
1062
		add	%g3, 0x1, %g3
1063

1064
		mov	2, %g1
1065
		wr	%g1, 0x0, %wim			! make window 1 invalid
1066
		WRITE_PAUSE
1067

1068
		cmp	%g3, 0x7
1069
		bne	2f
1070
		 nop
1071

1072
		/* Adjust our window handling routines to
1073
		 * do things correctly on 7 window Sparcs.
1074
		 */
1075

1076
#define		PATCH_INSN(src, dest) \
1077
		set	src, %g5; \
1078
		set	dest, %g2; \
1079
		ld	[%g5], %g4; \
1080
		st	%g4, [%g2];
1081
	
1082
		/* Patch for window spills... */
1083
		PATCH_INSN(spnwin_patch1_7win, spnwin_patch1)
1084
		PATCH_INSN(spnwin_patch2_7win, spnwin_patch2)
1085
		PATCH_INSN(spnwin_patch3_7win, spnwin_patch3)
1086

1087
		/* Patch for window fills... */
1088
		PATCH_INSN(fnwin_patch1_7win, fnwin_patch1)
1089
		PATCH_INSN(fnwin_patch2_7win, fnwin_patch2)
1090

1091
		/* Patch for trap entry setup... */
1092
		PATCH_INSN(tsetup_7win_patch1, tsetup_patch1)
1093
		PATCH_INSN(tsetup_7win_patch2, tsetup_patch2)
1094
		PATCH_INSN(tsetup_7win_patch3, tsetup_patch3)
1095
		PATCH_INSN(tsetup_7win_patch4, tsetup_patch4)
1096
		PATCH_INSN(tsetup_7win_patch5, tsetup_patch5)
1097
		PATCH_INSN(tsetup_7win_patch6, tsetup_patch6)
1098

1099
		/* Patch for returning from traps... */
1100
		PATCH_INSN(rtrap_7win_patch1, rtrap_patch1)
1101
		PATCH_INSN(rtrap_7win_patch2, rtrap_patch2)
1102
		PATCH_INSN(rtrap_7win_patch3, rtrap_patch3)
1103
		PATCH_INSN(rtrap_7win_patch4, rtrap_patch4)
1104
		PATCH_INSN(rtrap_7win_patch5, rtrap_patch5)
1105

1106
		/* Patch for killing user windows from the register file. */
1107
		PATCH_INSN(kuw_patch1_7win, kuw_patch1)
1108

1109
		/* Now patch the kernel window flush sequences.
1110
		 * This saves 2 traps on every switch and fork.
1111
		 */
1112
		set	0x01000000, %g4
1113
		set	flush_patch_one, %g5
1114
		st	%g4, [%g5 + 0x18]
1115
		st	%g4, [%g5 + 0x1c]
1116
		set	flush_patch_two, %g5
1117
		st	%g4, [%g5 + 0x18]
1118
		st	%g4, [%g5 + 0x1c]
1119
		set	flush_patch_three, %g5
1120
		st	%g4, [%g5 + 0x18]
1121
		st	%g4, [%g5 + 0x1c]
1122
		set	flush_patch_four, %g5
1123
		st	%g4, [%g5 + 0x18]
1124
		st	%g4, [%g5 + 0x1c]
1125
		set	flush_patch_exception, %g5
1126
		st	%g4, [%g5 + 0x18]
1127
		st	%g4, [%g5 + 0x1c]
1128
		set	flush_patch_switch, %g5
1129
		st	%g4, [%g5 + 0x18]
1130
		st	%g4, [%g5 + 0x1c]
1131

1132
2:		
1133
		sethi	%hi(nwindows), %g4
1134
		st	%g3, [%g4 + %lo(nwindows)]	! store final value
1135
		sub	%g3, 0x1, %g3
1136
		sethi	%hi(nwindowsm1), %g4
1137
		st	%g3, [%g4 + %lo(nwindowsm1)]
1138

1139
		/* Here we go, start using Linux's trap table... */
1140
		set	trapbase, %g3
1141
		wr	%g3, 0x0, %tbr
1142
		WRITE_PAUSE
1143

1144
		/* Finally, turn on traps so that we can call c-code. */
1145
		rd	%psr, %g3
1146
		wr	%g3, 0x0, %psr
1147
		WRITE_PAUSE
1148

1149
		wr	%g3, PSR_ET, %psr
1150
		WRITE_PAUSE
1151

1152
		/* First we call prom_init() to set up PROMLIB, then
1153
		 * off to start_kernel().
1154
		 */
1155

1156
		sethi	%hi(prom_vector_p), %g5
1157
		ld	[%g5 + %lo(prom_vector_p)], %o0
1158
		call	prom_init
1159
		 nop
1160

1161
		call 	start_kernel
1162
		 nop
1163
	
1164
		/* We should not get here. */
1165
		call	halt_me
1166
		 nop
1167

1168
sun4_init:
1169
		sethi   %hi(SUN4_PROM_VECTOR+0x84), %o1
1170
		ld      [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1
1171
		set     sun4_notsup, %o0
1172
		call    %o1	/* printf */
1173
		 nop
1174
		sethi   %hi(SUN4_PROM_VECTOR+0xc4), %o1
1175
		ld      [%o1 + %lo(SUN4_PROM_VECTOR+0xc4)], %o1
1176
		call    %o1	/* exittomon */
1177
		 nop
1178
1:		ba      1b                      ! Cannot exit into KMON
1179
		 nop
1180

1181
no_sun4e_here:
1182
		ld	[%g7 + 0x68], %o1
1183
		set	sun4e_notsup, %o0
1184
		call	%o1
1185
		 nop
1186
		b	halt_me
1187
		 nop
1188

1189
		__INITDATA
1190

1191
sun4u_1:
1192
		.asciz "finddevice"
1193
		.align	4
1194
sun4u_2:
1195
		.asciz "/chosen"
1196
		.align	4
1197
sun4u_3:
1198
		.asciz "getprop"
1199
		.align	4
1200
sun4u_4:
1201
		.asciz "stdout"
1202
		.align	4
1203
sun4u_5:
1204
		.asciz "write"
1205
		.align	4
1206
sun4u_6:
1207
        	.asciz  "\n\rOn sun4u you have to use UltraLinux (64bit) kernel\n\rand not a 32bit sun4[cdem] version\n\r\n\r"
1208
sun4u_6e:
1209
		.align	4
1210
sun4u_7:
1211
		.asciz "exit"
1212
		.align	8
1213
sun4u_a1:
1214
		.word	0, sun4u_1, 0, 1, 0, 1, 0, sun4u_2, 0
1215
sun4u_r1:
1216
		.word	0
1217
sun4u_a2:
1218
		.word	0, sun4u_3, 0, 4, 0, 1, 0
1219
sun4u_i2:
1220
		.word	0, 0, sun4u_4, 0, sun4u_1, 0, 8, 0
1221
sun4u_r2:
1222
		.word	0
1223
sun4u_a3:
1224
		.word	0, sun4u_5, 0, 3, 0, 1, 0
1225
sun4u_i3:
1226
		.word	0, 0, sun4u_6, 0, sun4u_6e - sun4u_6 - 1, 0
1227
sun4u_r3:
1228
		.word	0
1229
sun4u_a4:
1230
		.word	0, sun4u_7, 0, 0, 0, 0
1231
sun4u_r4:
1232

1233
		__INIT
1234
no_sun4u_here:
1235
		set	sun4u_a1, %o0
1236
		set	current_pc, %l2
1237
		cmp	%l2, %g3
1238
		be	1f
1239
		 mov	%o4, %l0
1240
		sub	%g3, %l2, %l6
1241
		add	%o0, %l6, %o0
1242
		mov	%o0, %l4
1243
		mov	sun4u_r4 - sun4u_a1, %l3
1244
		ld	[%l4], %l5
1245
2:
1246
		add	%l4, 4, %l4
1247
		cmp	%l5, %l2
1248
		add	%l5, %l6, %l5
1249
		bgeu,a	3f
1250
		 st	%l5, [%l4 - 4]
1251
3:
1252
		subcc	%l3, 4, %l3
1253
		bne	2b
1254
		 ld	[%l4], %l5
1255
1:
1256
		call	%l0
1257
		 mov	%o0, %l1
1258

1259
		ld	[%l1 + (sun4u_r1 - sun4u_a1)], %o1
1260
		add	%l1, (sun4u_a2 - sun4u_a1), %o0
1261
		call	%l0
1262
		 st	%o1, [%o0 + (sun4u_i2 - sun4u_a2)]
1263

1264
		ld	[%l1 + (sun4u_1 - sun4u_a1)], %o1
1265
		add	%l1, (sun4u_a3 - sun4u_a1), %o0
1266
		call	%l0
1267
		st	%o1, [%o0 + (sun4u_i3 - sun4u_a3)]
1268

1269
		call	%l0
1270
		 add	%l1, (sun4u_a4 - sun4u_a1), %o0
1271

1272
		/* Not reached */
1273
halt_me:
1274
		ld	[%g7 + 0x74], %o0
1275
		call	%o0			! Get us out of here...
1276
		 nop				! Apparently Solaris is better.
1277

1278
/* Ok, now we continue in the .data/.text sections */
1279

1280
	.data
1281
	.align 4
1282

1283
/*
1284
 * Fill up the prom vector, note in particular the kind first element,
1285
 * no joke. I don't need all of them in here as the entire prom vector
1286
 * gets initialized in c-code so all routines can use it.
1287
 */
1288

1289
prom_vector_p:
1290
		.word 0
1291

1292
/* We calculate the following at boot time, window fills/spills and trap entry
1293
 * code uses these to keep track of the register windows.
1294
 */
1295

1296
	.align 4
1297
	.globl	nwindows
1298
	.globl	nwindowsm1
1299
nwindows:
1300
	.word	8
1301
nwindowsm1:
1302
	.word	7
1303

1304
/* Boot time debugger vector value.  We need this later on. */
1305

1306
	.align 4
1307
	.globl	linux_dbvec
1308
linux_dbvec:
1309
	.word	0
1310
	.word	0
1311

1312
	.align 8
1313

1314
	.globl	lvl14_save
1315
lvl14_save:
1316
	.word	0
1317
	.word	0
1318
	.word	0
1319
	.word	0
1320
	.word	t_irq14
1321

1322
        .section        ".fixup",#alloc,#execinstr
1323
        .globl  __ret_efault
1324
__ret_efault:
1325
        ret
1326
         restore %g0, -EFAULT, %o0
1327

1328
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