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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/m32r/boot/compressed/m32r_sio.c
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/*

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 * arch/m32r/boot/compressed/m32r_sio.c

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 *

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 * 2003-02-12:	Takeo Takahashi

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 * 2006-11-30:	OPSPUT support by Kazuhiro Inaoka

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 *

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 */

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#include <asm/processor.h>

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static void putc(char c);

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static int puts(const char *s)

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{

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	char c;

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	while ((c = *s++)) putc(c);

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	return 0;

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}

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#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT)

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#include <asm/m32r.h>

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#include <asm/io.h>

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#define USE_FPGA_MAP	0

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#if USE_FPGA_MAP

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/*

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 * fpga configuration program uses MMU, and define map as same as

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 * M32104 uT-Engine board.

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 */

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#define BOOT_SIO0STS	(volatile unsigned short *)(0x02c00000 + 0x20006)

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#define BOOT_SIO0TXB	(volatile unsigned short *)(0x02c00000 + 0x2000c)

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#else

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#undef PLD_BASE

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#if defined(CONFIG_PLAT_OPSPUT)

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#define PLD_BASE	0x1cc00000

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#else

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#define PLD_BASE	0xa4c00000

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#endif

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#define BOOT_SIO0STS	PLD_ESIO0STS

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#define BOOT_SIO0TXB	PLD_ESIO0TXB

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#endif

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static void putc(char c)

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{

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	while ((*BOOT_SIO0STS & 0x3) != 0x3)

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		cpu_relax();

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	if (c == '\n') {

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		*BOOT_SIO0TXB = '\r';

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		while ((*BOOT_SIO0STS & 0x3) != 0x3)

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			cpu_relax();

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	}

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	*BOOT_SIO0TXB = c;

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}

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#else /* !(CONFIG_PLAT_M32700UT) */

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#if defined(CONFIG_PLAT_MAPPI2)

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#define SIO0STS	(volatile unsigned short *)(0xa0efd000 + 14)

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#define SIO0TXB	(volatile unsigned short *)(0xa0efd000 + 30)

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#else

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#define SIO0STS	(volatile unsigned short *)(0x00efd000 + 14)

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#define SIO0TXB	(volatile unsigned short *)(0x00efd000 + 30)

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#endif

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static void putc(char c)

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{

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	while ((*SIO0STS & 0x1) == 0)

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		cpu_relax();

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	if (c == '\n') {

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		*SIO0TXB = '\r';

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		while ((*SIO0STS & 0x1) == 0)

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			cpu_relax();

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	}

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	*SIO0TXB = c;

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}

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#endif

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