[deliverable/linux.git] / arch / sparc / kernel / trampoline_32.S

/*
 * trampoline.S: SMP cpu boot-up trampoline code.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#include <linux/init.h>
#include <asm/head.h>
#include <asm/psr.h>
#include <asm/page.h>
#include <asm/asi.h>
#include <asm/ptrace.h>
#include <asm/vaddrs.h>
#include <asm/contregs.h>
#include <asm/thread_info.h>

	.globl sun4m_cpu_startup
	.globl sun4d_cpu_startup

	__CPUINIT
	.align 4

/* When we start up a cpu for the first time it enters this routine.
 * This initializes the chip from whatever state the prom left it
 * in and sets PIL in %psr to 15, no irqs.
 */

sun4m_cpu_startup:
cpu1_startup:
	sethi	%hi(trapbase_cpu1), %g3
	b	1f
	 or	%g3, %lo(trapbase_cpu1), %g3

cpu2_startup:
	sethi	%hi(trapbase_cpu2), %g3
	b	1f
	 or	%g3, %lo(trapbase_cpu2), %g3

cpu3_startup:
	sethi	%hi(trapbase_cpu3), %g3
	b	1f
	 or	%g3, %lo(trapbase_cpu3), %g3

1:
	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	set	(PSR_PIL | PSR_S | PSR_PS), %g1
	wr	%g1, 0x0, %psr		! traps off though
	WRITE_PAUSE

	/* Our %wim is one behind CWP */
	mov	2, %g1
	wr	%g1, 0x0, %wim
	WRITE_PAUSE

	/* This identifies "this cpu". */
	wr	%g3, 0x0, %tbr
	WRITE_PAUSE

	/* Give ourselves a stack and curptr. */
	set	current_set, %g5
	srl	%g3, 10, %g4
	and	%g4, 0xc, %g4
	ld	[%g5 + %g4], %g6

	sethi	%hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	or	%sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	add	%g6, %sp, %sp

	/* Turn on traps (PSR_ET). */
	rd	%psr, %g1
	wr	%g1, PSR_ET, %psr	! traps on
	WRITE_PAUSE

	/* Init our caches, etc. */
	set	poke_srmmu, %g5
	ld	[%g5], %g5
	call	%g5
	 nop

	/* Start this processor. */
	call	smp4m_callin
	 nop

	b,a	smp_do_cpu_idle

	.text
	.align	4

smp_do_cpu_idle:
	call	cpu_idle
	 mov	0, %o0

	call	cpu_panic
	 nop

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

	__CPUINIT
	.align	4

sun4d_cpu_startup:
	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	set	(PSR_PIL | PSR_S | PSR_PS), %g1
	wr	%g1, 0x0, %psr		! traps off though
	WRITE_PAUSE

	/* Our %wim is one behind CWP */
	mov	2, %g1
	wr	%g1, 0x0, %wim
	WRITE_PAUSE

	/* Set tbr - we use just one trap table. */
	set	trapbase, %g1
	wr	%g1, 0x0, %tbr
	WRITE_PAUSE

	/* Get our CPU id out of bootbus */
	set	SUN4D_BOOTBUS_CPUID, %g3
	lduba	[%g3] ASI_M_CTL, %g3
	and	%g3, 0xf8, %g3
	srl	%g3, 3, %g1
	sta	%g1, [%g0] ASI_M_VIKING_TMP1

	/* Give ourselves a stack and curptr. */
	set	current_set, %g5
	srl	%g3, 1, %g4
	ld	[%g5 + %g4], %g6

	sethi	%hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	or	%sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	add	%g6, %sp, %sp

	/* Turn on traps (PSR_ET). */
	rd	%psr, %g1
	wr	%g1, PSR_ET, %psr	! traps on
	WRITE_PAUSE

	/* Init our caches, etc. */
	set	poke_srmmu, %g5
	ld	[%g5], %g5
	call	%g5
	 nop

	/* Start this processor. */
	call	smp4d_callin
	 nop

	b,a	smp_do_cpu_idle

#ifdef CONFIG_SPARC_LEON

	__CPUINIT
	.align	4
        .global leon_smp_cpu_startup, smp_penguin_ctable

leon_smp_cpu_startup:

        set smp_penguin_ctable,%g1
        ld [%g1+4],%g1
        srl %g1,4,%g1
        set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
	sta %g1, [%g5] ASI_M_MMUREGS

	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	set	(PSR_PIL | PSR_S | PSR_PS), %g1
	wr	%g1, 0x0, %psr		! traps off though
	WRITE_PAUSE

	/* Our %wim is one behind CWP */
	mov	2, %g1
	wr	%g1, 0x0, %wim
	WRITE_PAUSE

	/* Set tbr - we use just one trap table. */
	set	trapbase, %g1
	wr	%g1, 0x0, %tbr
	WRITE_PAUSE

	/* Get our CPU id */
        rd     %asr17,%g3

	/* Give ourselves a stack and curptr. */
	set	current_set, %g5
	srl	%g3, 28, %g4
	sll	%g4, 2, %g4
	ld	[%g5 + %g4], %g6

	sethi	%hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	or	%sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	add	%g6, %sp, %sp

	/* Turn on traps (PSR_ET). */
	rd	%psr, %g1
	wr	%g1, PSR_ET, %psr	! traps on
	WRITE_PAUSE

	/* Init our caches, etc. */
	set	poke_srmmu, %g5
	ld	[%g5], %g5
	call	%g5
	 nop

	/* Start this processor. */
	call	leon_callin
	 nop

	b,a	smp_do_cpu_idle

#endif
Commit	Line	Data
88278ca2	1	/*
1da177e4 LT	2	* trampoline.S: SMP cpu boot-up trampoline code.
	3	*
	4	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	5	* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	6	*/
	7
	8	#include <linux/init.h>
	9	#include <asm/head.h>
	10	#include <asm/psr.h>
	11	#include <asm/page.h>
	12	#include <asm/asi.h>
	13	#include <asm/ptrace.h>
	14	#include <asm/vaddrs.h>
	15	#include <asm/contregs.h>
	16	#include <asm/thread_info.h>
	17
c68e5d39 DM	18	.globl sun4m_cpu_startup
c68e5d39 DM	19	.globl sun4d_cpu_startup
1da177e4	20
409832f5	21	__CPUINIT
1da177e4 LT	22	.align 4
	23
	24	/* When we start up a cpu for the first time it enters this routine.
	25	* This initializes the chip from whatever state the prom left it
	26	* in and sets PIL in %psr to 15, no irqs.
	27	*/
	28
	29	sun4m_cpu_startup:
	30	cpu1_startup:
	31	sethi %hi(trapbase_cpu1), %g3
	32	b 1f
	33	or %g3, %lo(trapbase_cpu1), %g3
	34
	35	cpu2_startup:
	36	sethi %hi(trapbase_cpu2), %g3
	37	b 1f
	38	or %g3, %lo(trapbase_cpu2), %g3
	39
	40	cpu3_startup:
	41	sethi %hi(trapbase_cpu3), %g3
	42	b 1f
	43	or %g3, %lo(trapbase_cpu3), %g3
	44
	45	1:
	46	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	47	set (PSR_PIL \| PSR_S \| PSR_PS), %g1
	48	wr %g1, 0x0, %psr ! traps off though
	49	WRITE_PAUSE
	50
	51	/* Our %wim is one behind CWP */
	52	mov 2, %g1
	53	wr %g1, 0x0, %wim
	54	WRITE_PAUSE
	55
	56	/* This identifies "this cpu". */
	57	wr %g3, 0x0, %tbr
	58	WRITE_PAUSE
	59
	60	/* Give ourselves a stack and curptr. */
	61	set current_set, %g5
	62	srl %g3, 10, %g4
	63	and %g4, 0xc, %g4
	64	ld [%g5 + %g4], %g6
	65
	66	sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	67	or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	68	add %g6, %sp, %sp
	69
	70	/* Turn on traps (PSR_ET). */
	71	rd %psr, %g1
	72	wr %g1, PSR_ET, %psr ! traps on
	73	WRITE_PAUSE
	74
	75	/* Init our caches, etc. */
	76	set poke_srmmu, %g5
	77	ld [%g5], %g5
	78	call %g5
	79	nop
	80
	81	/* Start this processor. */
	82	call smp4m_callin
	83	nop
	84
	85	b,a smp_do_cpu_idle
86
87	.text
88	.align 4
89
90	smp_do_cpu_idle:
91	call cpu_idle
92	mov 0, %o0
93
94	call cpu_panic
95	nop
96
1da177e4 LT	97	/* CPUID in bootbus can be found at PA 0xff0140000 */
	98	#define SUN4D_BOOTBUS_CPUID 0xf0140000
	99
409832f5	100	__CPUINIT
1da177e4 LT	101	.align 4
	102
	103	sun4d_cpu_startup:
	104	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	105	set (PSR_PIL \| PSR_S \| PSR_PS), %g1
	106	wr %g1, 0x0, %psr ! traps off though
	107	WRITE_PAUSE
	108
	109	/* Our %wim is one behind CWP */
	110	mov 2, %g1
	111	wr %g1, 0x0, %wim
	112	WRITE_PAUSE
	113
	114	/* Set tbr - we use just one trap table. */
	115	set trapbase, %g1
	116	wr %g1, 0x0, %tbr
	117	WRITE_PAUSE
	118
	119	/* Get our CPU id out of bootbus */
	120	set SUN4D_BOOTBUS_CPUID, %g3
	121	lduba [%g3] ASI_M_CTL, %g3
	122	and %g3, 0xf8, %g3
	123	srl %g3, 3, %g1
	124	sta %g1, [%g0] ASI_M_VIKING_TMP1
	125
	126	/* Give ourselves a stack and curptr. */
	127	set current_set, %g5
	128	srl %g3, 1, %g4
	129	ld [%g5 + %g4], %g6
	130
	131	sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	132	or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	133	add %g6, %sp, %sp
	134
	135	/* Turn on traps (PSR_ET). */
	136	rd %psr, %g1
	137	wr %g1, PSR_ET, %psr ! traps on
	138	WRITE_PAUSE
	139
	140	/* Init our caches, etc. */
	141	set poke_srmmu, %g5
	142	ld [%g5], %g5
	143	call %g5
	144	nop
	145
	146	/* Start this processor. */
	147	call smp4d_callin
	148	nop
	149
	150	b,a smp_do_cpu_idle
8401707f KE	151
	152	#ifdef CONFIG_SPARC_LEON
	153
	154	__CPUINIT
	155	.align 4
	156	.global leon_smp_cpu_startup, smp_penguin_ctable
	157
	158	leon_smp_cpu_startup:
	159
	160	set smp_penguin_ctable,%g1
	161	ld [%g1+4],%g1
	162	srl %g1,4,%g1
	163	set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
	164	sta %g1, [%g5] ASI_M_MMUREGS
	165
	166	/* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
	167	set (PSR_PIL \| PSR_S \| PSR_PS), %g1
	168	wr %g1, 0x0, %psr ! traps off though
	169	WRITE_PAUSE
	170
	171	/* Our %wim is one behind CWP */
	172	mov 2, %g1
	173	wr %g1, 0x0, %wim
	174	WRITE_PAUSE
	175
	176	/* Set tbr - we use just one trap table. */
	177	set trapbase, %g1
	178	wr %g1, 0x0, %tbr
	179	WRITE_PAUSE
	180
	181	/* Get our CPU id */
	182	rd %asr17,%g3
	183
	184	/* Give ourselves a stack and curptr. */
	185	set current_set, %g5
	186	srl %g3, 28, %g4
	187	sll %g4, 2, %g4
	188	ld [%g5 + %g4], %g6
	189
	190	sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
	191	or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
	192	add %g6, %sp, %sp
	193
	194	/* Turn on traps (PSR_ET). */
	195	rd %psr, %g1
	196	wr %g1, PSR_ET, %psr ! traps on
	197	WRITE_PAUSE
	198
	199	/* Init our caches, etc. */
	200	set poke_srmmu, %g5
	201	ld [%g5], %g5
	202	call %g5
	203	nop
	204
	205	/* Start this processor. */
	206	call leon_callin
	207	nop
	208
	209	b,a smp_do_cpu_idle
	210
	211	#endif