Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/dec/tc.c
10817 views
1
/*

2
 *	TURBOchannel architecture calls.

3
 *

4
 *	Copyright (c) Harald Koerfgen, 1998

5
 *	Copyright (c) 2001, 2003, 2005, 2006  Maciej W. Rozycki

6
 *	Copyright (c) 2005  James Simmons

7
 *

8
 *	This file is subject to the terms and conditions of the GNU

9
 *	General Public License.  See the file "COPYING" in the main

10
 *	directory of this archive for more details.

11
 */

12
#include <linux/compiler.h>

13
#include <linux/errno.h>

14
#include <linux/init.h>

15
#include <linux/string.h>

16
#include <linux/tc.h>

17
#include <linux/types.h>

18


19
#include <asm/addrspace.h>

20
#include <asm/bootinfo.h>

21
#include <asm/paccess.h>

22


23
#include <asm/dec/interrupts.h>

24
#include <asm/dec/prom.h>

25
#include <asm/dec/system.h>

26


27
/*

28
 * Protected read byte from TURBOchannel slot space.

29
 */

30
int tc_preadb(u8 *valp, void __iomem *addr)

31
{

32
	return get_dbe(*valp, (u8 *)addr);

33
}

34


35
/*

36
 * Get TURBOchannel bus information as specified by the spec, plus

37
 * the slot space base address and the number of slots.

38
 */

39
int __init tc_bus_get_info(struct tc_bus *tbus)

40
{

41
	if (!dec_tc_bus)

42
		return -ENXIO;

43


44
	memcpy(&tbus->info, rex_gettcinfo(), sizeof(tbus->info));

45
	tbus->slot_base = CPHYSADDR((long)rex_slot_address(0));

46


47
	switch (mips_machtype) {

48
	case MACH_DS5000_200:

49
		tbus->num_tcslots = 7;

50
		break;

51
	case MACH_DS5000_2X0:

52
	case MACH_DS5900:

53
		tbus->ext_slot_base = 0x20000000;

54
		tbus->ext_slot_size = 0x20000000;

55
		/* fall through */

56
	case MACH_DS5000_1XX:

57
		tbus->num_tcslots = 3;

58
		break;

59
	case MACH_DS5000_XX:

60
		tbus->num_tcslots = 2;

61
	default:

62
		break;

63
	}

64
	return 0;

65
}

66


67
/*

68
 * Get the IRQ for the specified slot.

69
 */

70
void __init tc_device_get_irq(struct tc_dev *tdev)

71
{

72
	switch (tdev->slot) {

73
	case 0:

74
		tdev->interrupt = dec_interrupt[DEC_IRQ_TC0];

75
		break;

76
	case 1:

77
		tdev->interrupt = dec_interrupt[DEC_IRQ_TC1];

78
		break;

79
	case 2:

80
		tdev->interrupt = dec_interrupt[DEC_IRQ_TC2];

81
		break;

82
	/*

83
	 * Yuck! DS5000/200 onboard devices

84
	 */

85
	case 5:

86
		tdev->interrupt = dec_interrupt[DEC_IRQ_TC5];

87
		break;

88
	case 6:

89
		tdev->interrupt = dec_interrupt[DEC_IRQ_TC6];

90
		break;

91
	default:

92
		tdev->interrupt = -1;

93
		break;

94
	}

95
}

96


97