summaryrefslogtreecommitdiffstats
path: root/arch/sparc/mm/viking.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/mm/viking.S')
-rw-r--r--arch/sparc/mm/viking.S284
1 files changed, 284 insertions, 0 deletions
diff --git a/arch/sparc/mm/viking.S b/arch/sparc/mm/viking.S
new file mode 100644
index 000000000..48f062de7
--- /dev/null
+++ b/arch/sparc/mm/viking.S
@@ -0,0 +1,284 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * viking.S: High speed Viking cache/mmu operations
+ *
+ * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
+ * Copyright (C) 1999 Pavel Semerad (semerad@ss1000.ms.mff.cuni.cz)
+ */
+
+#include <asm/ptrace.h>
+#include <asm/psr.h>
+#include <asm/asm-offsets.h>
+#include <asm/asi.h>
+#include <asm/mxcc.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/pgtsrmmu.h>
+#include <asm/viking.h>
+
+#ifdef CONFIG_SMP
+ .data
+ .align 4
+sun4dsmp_flush_tlb_spin:
+ .word 0
+#endif
+
+ .text
+ .align 4
+
+ .globl viking_flush_cache_all, viking_flush_cache_mm
+ .globl viking_flush_cache_range, viking_flush_cache_page
+ .globl viking_flush_page, viking_mxcc_flush_page
+ .globl viking_flush_page_for_dma, viking_flush_page_to_ram
+ .globl viking_flush_sig_insns
+ .globl viking_flush_tlb_all, viking_flush_tlb_mm
+ .globl viking_flush_tlb_range, viking_flush_tlb_page
+
+viking_flush_page:
+ sethi %hi(PAGE_OFFSET), %g2
+ sub %o0, %g2, %g3
+ srl %g3, 12, %g1 ! ppage >> 12
+
+ clr %o1 ! set counter, 0 - 127
+ sethi %hi(PAGE_OFFSET + PAGE_SIZE - 0x80000000), %o3
+ sethi %hi(0x80000000), %o4
+ sethi %hi(VIKING_PTAG_VALID), %o5
+ sethi %hi(2*PAGE_SIZE), %o0
+ sethi %hi(PAGE_SIZE), %g7
+ clr %o2 ! block counter, 0 - 3
+5:
+ sll %o1, 5, %g4
+ or %g4, %o4, %g4 ! 0x80000000 | (set << 5)
+
+ sll %o2, 26, %g5 ! block << 26
+6:
+ or %g5, %g4, %g5
+ ldda [%g5] ASI_M_DATAC_TAG, %g2
+ cmp %g3, %g1 ! ptag == ppage?
+ bne 7f
+ inc %o2
+
+ andcc %g2, %o5, %g0 ! ptag VALID?
+ be 7f
+ add %g4, %o3, %g2 ! (PAGE_OFFSET + PAGE_SIZE) | (set << 5)
+ ld [%g2], %g3
+ ld [%g2 + %g7], %g3
+ add %g2, %o0, %g2
+ ld [%g2], %g3
+ ld [%g2 + %g7], %g3
+ add %g2, %o0, %g2
+ ld [%g2], %g3
+ ld [%g2 + %g7], %g3
+ add %g2, %o0, %g2
+ ld [%g2], %g3
+ b 8f
+ ld [%g2 + %g7], %g3
+
+7:
+ cmp %o2, 3
+ ble 6b
+ sll %o2, 26, %g5 ! block << 26
+
+8: inc %o1
+ cmp %o1, 0x7f
+ ble 5b
+ clr %o2
+
+9: retl
+ nop
+
+viking_mxcc_flush_page:
+ sethi %hi(PAGE_OFFSET), %g2
+ sub %o0, %g2, %g3
+ sub %g3, -PAGE_SIZE, %g3 ! ppage + PAGE_SIZE
+ sethi %hi(MXCC_SRCSTREAM), %o3 ! assume %hi(MXCC_SRCSTREAM) == %hi(MXCC_DESTSTREAM)
+ mov 0x10, %g2 ! set cacheable bit
+ or %o3, %lo(MXCC_SRCSTREAM), %o2
+ or %o3, %lo(MXCC_DESSTREAM), %o3
+ sub %g3, MXCC_STREAM_SIZE, %g3
+6:
+ stda %g2, [%o2] ASI_M_MXCC
+ stda %g2, [%o3] ASI_M_MXCC
+ andncc %g3, PAGE_MASK, %g0
+ bne 6b
+ sub %g3, MXCC_STREAM_SIZE, %g3
+
+9: retl
+ nop
+
+viking_flush_cache_page:
+viking_flush_cache_range:
+#ifndef CONFIG_SMP
+ ld [%o0 + VMA_VM_MM], %o0
+#endif
+viking_flush_cache_mm:
+#ifndef CONFIG_SMP
+ ld [%o0 + AOFF_mm_context], %g1
+ cmp %g1, -1
+ bne viking_flush_cache_all
+ nop
+ b,a viking_flush_cache_out
+#endif
+viking_flush_cache_all:
+ WINDOW_FLUSH(%g4, %g5)
+viking_flush_cache_out:
+ retl
+ nop
+
+viking_flush_tlb_all:
+ mov 0x400, %g1
+ retl
+ sta %g0, [%g1] ASI_M_FLUSH_PROBE
+
+viking_flush_tlb_mm:
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + AOFF_mm_context], %o1
+ lda [%g1] ASI_M_MMUREGS, %g5
+#ifndef CONFIG_SMP
+ cmp %o1, -1
+ be 1f
+#endif
+ mov 0x300, %g2
+ sta %o1, [%g1] ASI_M_MMUREGS
+ sta %g0, [%g2] ASI_M_FLUSH_PROBE
+ retl
+ sta %g5, [%g1] ASI_M_MMUREGS
+#ifndef CONFIG_SMP
+1: retl
+ nop
+#endif
+
+viking_flush_tlb_range:
+ ld [%o0 + VMA_VM_MM], %o0
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + AOFF_mm_context], %o3
+ lda [%g1] ASI_M_MMUREGS, %g5
+#ifndef CONFIG_SMP
+ cmp %o3, -1
+ be 2f
+#endif
+ sethi %hi(~((1 << PGDIR_SHIFT) - 1)), %o4
+ sta %o3, [%g1] ASI_M_MMUREGS
+ and %o1, %o4, %o1
+ add %o1, 0x200, %o1
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+1: sub %o1, %o4, %o1
+ cmp %o1, %o2
+ blu,a 1b
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+ retl
+ sta %g5, [%g1] ASI_M_MMUREGS
+#ifndef CONFIG_SMP
+2: retl
+ nop
+#endif
+
+viking_flush_tlb_page:
+ ld [%o0 + VMA_VM_MM], %o0
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + AOFF_mm_context], %o3
+ lda [%g1] ASI_M_MMUREGS, %g5
+#ifndef CONFIG_SMP
+ cmp %o3, -1
+ be 1f
+#endif
+ and %o1, PAGE_MASK, %o1
+ sta %o3, [%g1] ASI_M_MMUREGS
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+ retl
+ sta %g5, [%g1] ASI_M_MMUREGS
+#ifndef CONFIG_SMP
+1: retl
+ nop
+#endif
+
+viking_flush_page_to_ram:
+viking_flush_page_for_dma:
+viking_flush_sig_insns:
+ retl
+ nop
+
+#ifdef CONFIG_SMP
+ .globl sun4dsmp_flush_tlb_all, sun4dsmp_flush_tlb_mm
+ .globl sun4dsmp_flush_tlb_range, sun4dsmp_flush_tlb_page
+sun4dsmp_flush_tlb_all:
+ sethi %hi(sun4dsmp_flush_tlb_spin), %g3
+1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ tst %g5
+ bne 2f
+ mov 0x400, %g1
+ sta %g0, [%g1] ASI_M_FLUSH_PROBE
+ retl
+ stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
+2: tst %g5
+ bne,a 2b
+ ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ b,a 1b
+
+sun4dsmp_flush_tlb_mm:
+ sethi %hi(sun4dsmp_flush_tlb_spin), %g3
+1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ tst %g5
+ bne 2f
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + AOFF_mm_context], %o1
+ lda [%g1] ASI_M_MMUREGS, %g5
+ mov 0x300, %g2
+ sta %o1, [%g1] ASI_M_MMUREGS
+ sta %g0, [%g2] ASI_M_FLUSH_PROBE
+ sta %g5, [%g1] ASI_M_MMUREGS
+ retl
+ stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
+2: tst %g5
+ bne,a 2b
+ ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ b,a 1b
+
+sun4dsmp_flush_tlb_range:
+ sethi %hi(sun4dsmp_flush_tlb_spin), %g3
+1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ tst %g5
+ bne 3f
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + VMA_VM_MM], %o0
+ ld [%o0 + AOFF_mm_context], %o3
+ lda [%g1] ASI_M_MMUREGS, %g5
+ sethi %hi(~((1 << PGDIR_SHIFT) - 1)), %o4
+ sta %o3, [%g1] ASI_M_MMUREGS
+ and %o1, %o4, %o1
+ add %o1, 0x200, %o1
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+2: sub %o1, %o4, %o1
+ cmp %o1, %o2
+ blu,a 2b
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+ sta %g5, [%g1] ASI_M_MMUREGS
+ retl
+ stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
+3: tst %g5
+ bne,a 3b
+ ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ b,a 1b
+
+sun4dsmp_flush_tlb_page:
+ sethi %hi(sun4dsmp_flush_tlb_spin), %g3
+1: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ tst %g5
+ bne 2f
+ mov SRMMU_CTX_REG, %g1
+ ld [%o0 + VMA_VM_MM], %o0
+ ld [%o0 + AOFF_mm_context], %o3
+ lda [%g1] ASI_M_MMUREGS, %g5
+ and %o1, PAGE_MASK, %o1
+ sta %o3, [%g1] ASI_M_MMUREGS
+ sta %g0, [%o1] ASI_M_FLUSH_PROBE
+ sta %g5, [%g1] ASI_M_MMUREGS
+ retl
+ stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
+2: tst %g5
+ bne,a 2b
+ ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
+ b,a 1b
+ nop
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 18:01:52 +0000