CHIP-linux-libre/arch/sparc/mm/ultra.S

/*
 * ultra.S: Don't expand these all over the place...
 *
 * Copyright (C) 1997, 2000, 2008 David S. Miller (davem@davemloft.net)
 */

#include <asm/asi.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/spitfire.h>
#include <asm/mmu_context.h>
#include <asm/mmu.h>
#include <asm/pil.h>
#include <asm/head.h>
#include <asm/thread_info.h>
#include <asm/cacheflush.h>
#include <asm/hypervisor.h>
#include <asm/cpudata.h>

	/* Basically, most of the Spitfire vs. Cheetah madness
	 * has to do with the fact that Cheetah does not support
	 * IMMU flushes out of the secondary context.  Someone needs
	 * to throw a south lake birthday party for the folks
	 * in Microelectronics who refused to fix this shit.
	 */

	/* This file is meant to be read efficiently by the CPU, not humans.
	 * Staraj sie tego nikomu nie pierdolnac...
	 */
	.text
	.align		32
	.globl		__flush_tlb_mm
__flush_tlb_mm:		/* 18 insns */
	/* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
	ldxa		[%o1] ASI_DMMU, %g2
	cmp		%g2, %o0
	bne,pn		%icc, __spitfire_flush_tlb_mm_slow
	 mov		0x50, %g3
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	sethi		%hi(KERNBASE), %g3
	flush		%g3
	retl
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_page
__flush_tlb_page:	/* 22 insns */
	/* %o0 = context, %o1 = vaddr */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, %pstate
	mov		SECONDARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	stxa		%o0, [%o4] ASI_DMMU
	andcc		%o1, 1, %g0
	andn		%o1, 1, %o3
	be,pn		%icc, 1f
	 or		%o3, 0x10, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
1:	stxa		%g0, [%o3] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	retl
	 wrpr		%g7, 0x0, %pstate
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_pending
__flush_tlb_pending:	/* 26 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	rdpr		%pstate, %g7
	sllx		%o1, 3, %o1
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, %pstate
	mov		SECONDARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	stxa		%o0, [%o4] ASI_DMMU
1:	sub		%o1, (1 << 3), %o1
	ldx		[%o2 + %o1], %o3
	andcc		%o3, 1, %g0
	andn		%o3, 1, %o3
	be,pn		%icc, 2f
	 or		%o3, 0x10, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
2:	stxa		%g0, [%o3] ASI_DMMU_DEMAP
	membar		#Sync
	brnz,pt		%o1, 1b
	 nop
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	retl
	 wrpr		%g7, 0x0, %pstate
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_kernel_range
__flush_tlb_kernel_range:	/* 16 insns */
	/* %o0=start, %o1=end */
	cmp		%o0, %o1
	be,pn		%xcc, 2f
	 sethi		%hi(PAGE_SIZE), %o4
	sub		%o1, %o0, %o3
	sub		%o3, %o4, %o3
	or		%o0, 0x20, %o0		! Nucleus
1:	stxa		%g0, [%o0 + %o3] ASI_DMMU_DEMAP
	stxa		%g0, [%o0 + %o3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%o3, 1b
	 sub		%o3, %o4, %o3
2:	sethi		%hi(KERNBASE), %o3
	flush		%o3
	retl
	 nop
	nop

__spitfire_flush_tlb_mm_slow:
	rdpr		%pstate, %g1
	wrpr		%g1, PSTATE_IE, %pstate
	stxa		%o0, [%o1] ASI_DMMU
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	flush		%g6
	stxa		%g2, [%o1] ASI_DMMU
	sethi		%hi(KERNBASE), %o1
	flush		%o1
	retl
	 wrpr		%g1, 0, %pstate

/*
 * The following code flushes one page_size worth.
 */
	.section .kprobes.text, "ax"
	.align		32
	.globl		__flush_icache_page
__flush_icache_page:	/* %o0 = phys_page */
	srlx		%o0, PAGE_SHIFT, %o0
	sethi		%hi(PAGE_OFFSET), %g1
	sllx		%o0, PAGE_SHIFT, %o0
	sethi		%hi(PAGE_SIZE), %g2
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	add		%o0, %g1, %o0
1:	subcc		%g2, 32, %g2
	bne,pt		%icc, 1b
	 flush		%o0 + %g2
	retl
	 nop

#ifdef DCACHE_ALIASING_POSSIBLE

#if (PAGE_SHIFT != 13)
#error only page shift of 13 is supported by dcache flush
#endif

#define DTAG_MASK 0x3

	/* This routine is Spitfire specific so the hardcoded
	 * D-cache size and line-size are OK.
	 */
	.align		64
	.globl		__flush_dcache_page
__flush_dcache_page:	/* %o0=kaddr, %o1=flush_icache */
	sethi		%hi(PAGE_OFFSET), %g1
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	sub		%o0, %g1, %o0			! physical address
	srlx		%o0, 11, %o0			! make D-cache TAG
	sethi		%hi(1 << 14), %o2		! D-cache size
	sub		%o2, (1 << 5), %o2		! D-cache line size
1:	ldxa		[%o2] ASI_DCACHE_TAG, %o3	! load D-cache TAG
	andcc		%o3, DTAG_MASK, %g0		! Valid?
	be,pn		%xcc, 2f			! Nope, branch
	 andn		%o3, DTAG_MASK, %o3		! Clear valid bits
	cmp		%o3, %o0			! TAG match?
	bne,pt		%xcc, 2f			! Nope, branch
	 nop
	stxa		%g0, [%o2] ASI_DCACHE_TAG	! Invalidate TAG
	membar		#Sync
2:	brnz,pt		%o2, 1b
	 sub		%o2, (1 << 5), %o2		! D-cache line size

	/* The I-cache does not snoop local stores so we
	 * better flush that too when necessary.
	 */
	brnz,pt		%o1, __flush_icache_page
	 sllx		%o0, 11, %o0
	retl
	 nop

#endif /* DCACHE_ALIASING_POSSIBLE */

	.previous

	/* Cheetah specific versions, patched at boot time. */
__cheetah_flush_tlb_mm: /* 19 insns */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o2
	mov		0x40, %g3
	ldxa		[%o2] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o1
	sllx		%o1, CTX_PGSZ1_NUC_SHIFT, %o1
	or		%o0, %o1, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o2] ASI_DMMU
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	stxa		%g2, [%o2] ASI_DMMU
	sethi		%hi(KERNBASE), %o2
	flush		%o2
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

__cheetah_flush_tlb_page:	/* 22 insns */
	/* %o0 = context, %o1 = vaddr */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o3
	sllx		%o3, CTX_PGSZ1_NUC_SHIFT, %o3
	or		%o0, %o3, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o4] ASI_DMMU
	andcc		%o1, 1, %g0
	be,pn		%icc, 1f
	 andn		%o1, 1, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
1:	stxa		%g0, [%o3] ASI_DMMU_DEMAP	
	membar		#Sync
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

__cheetah_flush_tlb_pending:	/* 27 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	rdpr		%pstate, %g7
	sllx		%o1, 3, %o1
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o3
	sllx		%o3, CTX_PGSZ1_NUC_SHIFT, %o3
	or		%o0, %o3, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o4] ASI_DMMU
1:	sub		%o1, (1 << 3), %o1
	ldx		[%o2 + %o1], %o3
	andcc		%o3, 1, %g0
	be,pn		%icc, 2f
	 andn		%o3, 1, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
2:	stxa		%g0, [%o3] ASI_DMMU_DEMAP	
	membar		#Sync
	brnz,pt		%o1, 1b
	 nop
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

#ifdef DCACHE_ALIASING_POSSIBLE
__cheetah_flush_dcache_page: /* 11 insns */
	sethi		%hi(PAGE_OFFSET), %g1
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	sub		%o0, %g1, %o0
	sethi		%hi(PAGE_SIZE), %o4
1:	subcc		%o4, (1 << 5), %o4
	stxa		%g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE
	membar		#Sync
	bne,pt		%icc, 1b
	 nop
	retl		/* I-cache flush never needed on Cheetah, see callers. */
	 nop
#endif /* DCACHE_ALIASING_POSSIBLE */

	/* Hypervisor specific versions, patched at boot time.  */
__hypervisor_tlb_tl0_error:
	save		%sp, -192, %sp
	mov		%i0, %o0
	call		hypervisor_tlbop_error
	 mov		%i1, %o1
	ret
	 restore

__hypervisor_flush_tlb_mm: /* 10 insns */
	mov		%o0, %o2	/* ARG2: mmu context */
	mov		0, %o0		/* ARG0: CPU lists unimplemented */
	mov		0, %o1		/* ARG1: CPU lists unimplemented */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	brnz,pn		%o0, __hypervisor_tlb_tl0_error
	 mov		HV_FAST_MMU_DEMAP_CTX, %o1
	retl
	 nop

__hypervisor_flush_tlb_page: /* 11 insns */
	/* %o0 = context, %o1 = vaddr */
	mov		%o0, %g2
	mov		%o1, %o0              /* ARG0: vaddr + IMMU-bit */
	mov		%g2, %o1	      /* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	      /* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, __hypervisor_tlb_tl0_error
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	retl
	 nop

__hypervisor_flush_tlb_pending: /* 16 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	sllx		%o1, 3, %g1
	mov		%o2, %g2
	mov		%o0, %g3
1:	sub		%g1, (1 << 3), %g1
	ldx		[%g2 + %g1], %o0      /* ARG0: vaddr + IMMU-bit */
	mov		%g3, %o1	      /* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	      /* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, __hypervisor_tlb_tl0_error
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	brnz,pt		%g1, 1b
	 nop
	retl
	 nop

__hypervisor_flush_tlb_kernel_range: /* 16 insns */
	/* %o0=start, %o1=end */
	cmp		%o0, %o1
	be,pn		%xcc, 2f
	 sethi		%hi(PAGE_SIZE), %g3
	mov		%o0, %g1
	sub		%o1, %g1, %g2
	sub		%g2, %g3, %g2
1:	add		%g1, %g2, %o0	/* ARG0: virtual address */
	mov		0, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	/* ARG2: flags */
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, __hypervisor_tlb_tl0_error
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	brnz,pt		%g2, 1b
	 sub		%g2, %g3, %g2
2:	retl
	 nop

#ifdef DCACHE_ALIASING_POSSIBLE
	/* XXX Niagara and friends have an 8K cache, so no aliasing is
	 * XXX possible, but nothing explicit in the Hypervisor API
	 * XXX guarantees this.
	 */
__hypervisor_flush_dcache_page:	/* 2 insns */
	retl
	 nop
#endif

tlb_patch_one:
1:	lduw		[%o1], %g1
	stw		%g1, [%o0]
	flush		%o0
	subcc		%o2, 1, %o2
	add		%o1, 4, %o1
	bne,pt		%icc, 1b
	 add		%o0, 4, %o0
	retl
	 nop

	.globl		cheetah_patch_cachetlbops
cheetah_patch_cachetlbops:
	save		%sp, -128, %sp

	sethi		%hi(__flush_tlb_mm), %o0
	or		%o0, %lo(__flush_tlb_mm), %o0
	sethi		%hi(__cheetah_flush_tlb_mm), %o1
	or		%o1, %lo(__cheetah_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		19, %o2

	sethi		%hi(__flush_tlb_page), %o0
	or		%o0, %lo(__flush_tlb_page), %o0
	sethi		%hi(__cheetah_flush_tlb_page), %o1
	or		%o1, %lo(__cheetah_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		22, %o2

	sethi		%hi(__flush_tlb_pending), %o0
	or		%o0, %lo(__flush_tlb_pending), %o0
	sethi		%hi(__cheetah_flush_tlb_pending), %o1
	or		%o1, %lo(__cheetah_flush_tlb_pending), %o1
	call		tlb_patch_one
	 mov		27, %o2

#ifdef DCACHE_ALIASING_POSSIBLE
	sethi		%hi(__flush_dcache_page), %o0
	or		%o0, %lo(__flush_dcache_page), %o0
	sethi		%hi(__cheetah_flush_dcache_page), %o1
	or		%o1, %lo(__cheetah_flush_dcache_page), %o1
	call		tlb_patch_one
	 mov		11, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */

	ret
	 restore

#ifdef CONFIG_SMP
	/* These are all called by the slaves of a cross call, at
	 * trap level 1, with interrupts fully disabled.
	 *
	 * Register usage:
	 *   %g5	mm->context	(all tlb flushes)
	 *   %g1	address arg 1	(tlb page and range flushes)
	 *   %g7	address arg 2	(tlb range flush only)
	 *
	 *   %g6	scratch 1
	 *   %g2	scratch 2
	 *   %g3	scratch 3
	 *   %g4	scratch 4
	 */
	.align		32
	.globl		xcall_flush_tlb_mm
xcall_flush_tlb_mm:	/* 21 insns */
	mov		PRIMARY_CONTEXT, %g2
	ldxa		[%g2] ASI_DMMU, %g3
	srlx		%g3, CTX_PGSZ1_NUC_SHIFT, %g4
	sllx		%g4, CTX_PGSZ1_NUC_SHIFT, %g4
	or		%g5, %g4, %g5	/* Preserve nucleus page size fields */
	stxa		%g5, [%g2] ASI_DMMU
	mov		0x40, %g4
	stxa		%g0, [%g4] ASI_DMMU_DEMAP
	stxa		%g0, [%g4] ASI_IMMU_DEMAP
	stxa		%g3, [%g2] ASI_DMMU
	retry
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	.globl		xcall_flush_tlb_page
xcall_flush_tlb_page:	/* 17 insns */
	/* %g5=context, %g1=vaddr */
	mov		PRIMARY_CONTEXT, %g4
	ldxa		[%g4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %g4
	sllx		%g4, CTX_PGSZ1_NUC_SHIFT, %g4
	or		%g5, %g4, %g5
	mov		PRIMARY_CONTEXT, %g4
	stxa		%g5, [%g4] ASI_DMMU
	andcc		%g1, 0x1, %g0
	be,pn		%icc, 2f
	 andn		%g1, 0x1, %g5
	stxa		%g0, [%g5] ASI_IMMU_DEMAP
2:	stxa		%g0, [%g5] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g2, [%g4] ASI_DMMU
	retry
	nop
	nop

	.globl		xcall_flush_tlb_kernel_range
xcall_flush_tlb_kernel_range:	/* 25 insns */
	sethi		%hi(PAGE_SIZE - 1), %g2
	or		%g2, %lo(PAGE_SIZE - 1), %g2
	andn		%g1, %g2, %g1
	andn		%g7, %g2, %g7
	sub		%g7, %g1, %g3
	add		%g2, 1, %g2
	sub		%g3, %g2, %g3
	or		%g1, 0x20, %g1		! Nucleus
1:	stxa		%g0, [%g1 + %g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g1 + %g3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%g3, 1b
	 sub		%g3, %g2, %g3
	retry
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	/* This runs in a very controlled environment, so we do
	 * not need to worry about BH races etc.
	 */
	.globl		xcall_sync_tick
xcall_sync_tick:

661:	rdpr		%pstate, %g2
	wrpr		%g2, PSTATE_IG | PSTATE_AG, %pstate
	.section	.sun4v_2insn_patch, "ax"
	.word		661b
	nop
	nop
	.previous

	rdpr		%pil, %g2
	wrpr		%g0, PIL_NORMAL_MAX, %pil
	sethi		%hi(109f), %g7
	b,pt		%xcc, etrap_irq
109:	 or		%g7, %lo(109b), %g7
#ifdef CONFIG_TRACE_IRQFLAGS
	call		trace_hardirqs_off
	 nop
#endif
	call		smp_synchronize_tick_client
	 nop
	b		rtrap_xcall
	 ldx		[%sp + PTREGS_OFF + PT_V9_TSTATE], %l1

	.globl		xcall_fetch_glob_regs
xcall_fetch_glob_regs:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1
	rdpr		%tstate, %g7
	stx		%g7, [%g1 + GR_SNAP_TSTATE]
	rdpr		%tpc, %g7
	stx		%g7, [%g1 + GR_SNAP_TPC]
	rdpr		%tnpc, %g7
	stx		%g7, [%g1 + GR_SNAP_TNPC]
	stx		%o7, [%g1 + GR_SNAP_O7]
	stx		%i7, [%g1 + GR_SNAP_I7]
	/* Don't try this at home kids... */
	rdpr		%cwp, %g3
	sub		%g3, 1, %g7
	wrpr		%g7, %cwp
	mov		%i7, %g7
	wrpr		%g3, %cwp
	stx		%g7, [%g1 + GR_SNAP_RPC]
	sethi		%hi(trap_block), %g7
	or		%g7, %lo(trap_block), %g7
	sllx		%g2, TRAP_BLOCK_SZ_SHIFT, %g2
	add		%g7, %g2, %g7
	ldx		[%g7 + TRAP_PER_CPU_THREAD], %g3
	stx		%g3, [%g1 + GR_SNAP_THREAD]
	retry

	.globl		xcall_fetch_glob_pmu
xcall_fetch_glob_pmu:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1
	rd		%pic, %g7
	stx		%g7, [%g1 + (4 * 8)]
	rd		%pcr, %g7
	stx		%g7, [%g1 + (0 * 8)]
	retry

	.globl		xcall_fetch_glob_pmu_n4
xcall_fetch_glob_pmu_n4:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1

	ldxa		[%g0] ASI_PIC, %g7
	stx		%g7, [%g1 + (4 * 8)]
	mov		0x08, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (5 * 8)]
	mov		0x10, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (6 * 8)]
	mov		0x18, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (7 * 8)]

	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o5, %g7

	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		3, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (3 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		2, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (2 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		1, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (1 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		0, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (0 * 8)]

	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g7, %o5

	retry

#ifdef DCACHE_ALIASING_POSSIBLE
	.align		32
	.globl		xcall_flush_dcache_page_cheetah
xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */
	sethi		%hi(PAGE_SIZE), %g3
1:	subcc		%g3, (1 << 5), %g3
	stxa		%g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE
	membar		#Sync
	bne,pt		%icc, 1b
	 nop
	retry
	nop
#endif /* DCACHE_ALIASING_POSSIBLE */

	.globl		xcall_flush_dcache_page_spitfire
xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
				     %g7 == kernel page virtual address
				     %g5 == (page->mapping != NULL)  */
#ifdef DCACHE_ALIASING_POSSIBLE
	srlx		%g1, (13 - 2), %g1	! Form tag comparitor
	sethi		%hi(L1DCACHE_SIZE), %g3	! D$ size == 16K
	sub		%g3, (1 << 5), %g3	! D$ linesize == 32
1:	ldxa		[%g3] ASI_DCACHE_TAG, %g2
	andcc		%g2, 0x3, %g0
	be,pn		%xcc, 2f
	 andn		%g2, 0x3, %g2
	cmp		%g2, %g1

	bne,pt		%xcc, 2f
	 nop
	stxa		%g0, [%g3] ASI_DCACHE_TAG
	membar		#Sync
2:	cmp		%g3, 0
	bne,pt		%xcc, 1b
	 sub		%g3, (1 << 5), %g3

	brz,pn		%g5, 2f
#endif /* DCACHE_ALIASING_POSSIBLE */
	 sethi		%hi(PAGE_SIZE), %g3

1:	flush		%g7
	subcc		%g3, (1 << 5), %g3
	bne,pt		%icc, 1b
	 add		%g7, (1 << 5), %g7

2:	retry
	nop
	nop

	/* %g5:	error
	 * %g6:	tlb op
	 */
__hypervisor_tlb_xcall_error:
	mov	%g5, %g4
	mov	%g6, %g5
	ba,pt	%xcc, etrap
	 rd	%pc, %g7
	mov	%l4, %o0
	call	hypervisor_tlbop_error_xcall
	 mov	%l5, %o1
	ba,a,pt	%xcc, rtrap

	.globl		__hypervisor_xcall_flush_tlb_mm
__hypervisor_xcall_flush_tlb_mm: /* 21 insns */
	/* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o2, %g4
	mov		%o3, %g1
	mov		%o5, %g7
	clr		%o0		/* ARG0: CPU lists unimplemented */
	clr		%o1		/* ARG1: CPU lists unimplemented */
	mov		%g5, %o2	/* ARG2: mmu context */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	mov		HV_FAST_MMU_DEMAP_CTX, %g6
	brnz,pn		%o0, __hypervisor_tlb_xcall_error
	 mov		%o0, %g5
	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g4, %o2
	mov		%g1, %o3
	mov		%g7, %o5
	membar		#Sync
	retry

	.globl		__hypervisor_xcall_flush_tlb_page
__hypervisor_xcall_flush_tlb_page: /* 17 insns */
	/* %g5=ctx, %g1=vaddr */
	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o2, %g4
	mov		%g1, %o0	        /* ARG0: virtual address */
	mov		%g5, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2		/* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	mov		HV_MMU_UNMAP_ADDR_TRAP, %g6
	brnz,a,pn	%o0, __hypervisor_tlb_xcall_error
	 mov		%o0, %g5
	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g4, %o2
	membar		#Sync
	retry

	.globl		__hypervisor_xcall_flush_tlb_kernel_range
__hypervisor_xcall_flush_tlb_kernel_range: /* 25 insns */
	/* %g1=start, %g7=end, g2,g3,g4,g5,g6=scratch */
	sethi		%hi(PAGE_SIZE - 1), %g2
	or		%g2, %lo(PAGE_SIZE - 1), %g2
	andn		%g1, %g2, %g1
	andn		%g7, %g2, %g7
	sub		%g7, %g1, %g3
	add		%g2, 1, %g2
	sub		%g3, %g2, %g3
	mov		%o0, %g2
	mov		%o1, %g4
	mov		%o2, %g7
1:	add		%g1, %g3, %o0	/* ARG0: virtual address */
	mov		0, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	/* ARG2: flags */
	ta		HV_MMU_UNMAP_ADDR_TRAP
	mov		HV_MMU_UNMAP_ADDR_TRAP, %g6
	brnz,pn		%o0, __hypervisor_tlb_xcall_error
	 mov		%o0, %g5
	sethi		%hi(PAGE_SIZE), %o2
	brnz,pt		%g3, 1b
	 sub		%g3, %o2, %g3
	mov		%g2, %o0
	mov		%g4, %o1
	mov		%g7, %o2
	membar		#Sync
	retry

	/* These just get rescheduled to PIL vectors. */
	.globl		xcall_call_function
xcall_call_function:
	wr		%g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
	retry

	.globl		xcall_call_function_single
xcall_call_function_single:
	wr		%g0, (1 << PIL_SMP_CALL_FUNC_SNGL), %set_softint
	retry

	.globl		xcall_receive_signal
xcall_receive_signal:
	wr		%g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint
	retry

	.globl		xcall_capture
xcall_capture:
	wr		%g0, (1 << PIL_SMP_CAPTURE), %set_softint
	retry

	.globl		xcall_new_mmu_context_version
xcall_new_mmu_context_version:
	wr		%g0, (1 << PIL_SMP_CTX_NEW_VERSION), %set_softint
	retry

#ifdef CONFIG_KGDB
	.globl		xcall_kgdb_capture
xcall_kgdb_capture:
	wr		%g0, (1 << PIL_KGDB_CAPTURE), %set_softint
	retry
#endif

#endif /* CONFIG_SMP */


	.globl		hypervisor_patch_cachetlbops
hypervisor_patch_cachetlbops:
	save		%sp, -128, %sp

	sethi		%hi(__flush_tlb_mm), %o0
	or		%o0, %lo(__flush_tlb_mm), %o0
	sethi		%hi(__hypervisor_flush_tlb_mm), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		10, %o2

	sethi		%hi(__flush_tlb_page), %o0
	or		%o0, %lo(__flush_tlb_page), %o0
	sethi		%hi(__hypervisor_flush_tlb_page), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		11, %o2

	sethi		%hi(__flush_tlb_pending), %o0
	or		%o0, %lo(__flush_tlb_pending), %o0
	sethi		%hi(__hypervisor_flush_tlb_pending), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_pending), %o1
	call		tlb_patch_one
	 mov		16, %o2

	sethi		%hi(__flush_tlb_kernel_range), %o0
	or		%o0, %lo(__flush_tlb_kernel_range), %o0
	sethi		%hi(__hypervisor_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		16, %o2

#ifdef DCACHE_ALIASING_POSSIBLE
	sethi		%hi(__flush_dcache_page), %o0
	or		%o0, %lo(__flush_dcache_page), %o0
	sethi		%hi(__hypervisor_flush_dcache_page), %o1
	or		%o1, %lo(__hypervisor_flush_dcache_page), %o1
	call		tlb_patch_one
	 mov		2, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */

#ifdef CONFIG_SMP
	sethi		%hi(xcall_flush_tlb_mm), %o0
	or		%o0, %lo(xcall_flush_tlb_mm), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_mm), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		21, %o2

	sethi		%hi(xcall_flush_tlb_page), %o0
	or		%o0, %lo(xcall_flush_tlb_page), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_page), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		17, %o2

	sethi		%hi(xcall_flush_tlb_kernel_range), %o0
	or		%o0, %lo(xcall_flush_tlb_kernel_range), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		25, %o2
#endif /* CONFIG_SMP */

	ret
	 restore