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authorDale Rahn <drahn@cvs.openbsd.org>2009-05-09 02:28:23 +0000
committerDale Rahn <drahn@cvs.openbsd.org>2009-05-09 02:28:23 +0000
commit5a8d091322642f4fbc93f5ba9c5bdd81ee3fbaec (patch)
tree4db29e910e2d28ecaa47892a4890aadd2eed04df /sys/arch/arm
parent52696c14bf71578e4df4364defcc8d51f4451723 (diff)
Missed adding this file.
Diffstat (limited to 'sys/arch/arm')
-rw-r--r--sys/arch/arm/arm/cpufunc_asm_armv7.S134
1 files changed, 134 insertions, 0 deletions
diff --git a/sys/arch/arm/arm/cpufunc_asm_armv7.S b/sys/arch/arm/arm/cpufunc_asm_armv7.S
new file mode 100644
index 00000000000..5cb98b82ee1
--- /dev/null
+++ b/sys/arch/arm/arm/cpufunc_asm_armv7.S
@@ -0,0 +1,134 @@
+/* $OpenBSD: cpufunc_asm_armv7.S,v 1.1 2009/05/09 02:28:22 drahn Exp $ */
+/*
+ * Copyright (c) 2008 Dale Rahn <drahn@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <machine/cpu.h>
+#include <machine/asm.h>
+
+ENTRY(armv7_cpu_sleep)
+#if 0
+ wfi
+#else
+ .long 0xe340f003;
+#endif
+ mov pc, lr
+
+ENTRY(armv7_drain_writebuf)
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+/*
+ * Functions to set the MMU Translation Table Base register
+ *
+ * We need to clean and flush the cache as it uses virtual
+ * addresses that are about to change.
+ */
+ENTRY(armv7_setttb)
+ stmfd sp!, {r0, lr}
+ bl _C_LABEL(armv7_idcache_wbinv_all)
+ ldmfd sp!, {r0, lr}
+
+ mcr p15, 0, r0, c2, c0, 0 /* load new TTB */
+
+ mcr p15, 0, r0, c8, c7, 0 /* invalidate I+D TLBs */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+/*
+ * TLB functions
+ */
+ENTRY(armv7_tlb_flushID_SE)
+ mcr p15, 0, r0, c8, c6, 1 /* flush D tlb single entry */
+ mcr p15, 0, r0, c8, c5, 1 /* flush I tlb single entry */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+ENTRY(armv7_tlb_flushI_SE)
+ mcr p15, 0, r0, c8, c5, 1 /* flush I tlb single entry */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+/*
+ * TLB functions
+ */
+ENTRY(armv7_tlb_flushID)
+ mcr p15, 0, r0, c8, c7, 0 /* flush I+D tlb */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+ENTRY(armv7_tlb_flushI)
+ mcr p15, 0, r0, c8, c5, 0 /* flush I tlb */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+ENTRY(armv7_tlb_flushD)
+ mcr p15, 0, r0, c8, c6, 0 /* flush D tlb */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+ENTRY(armv7_tlb_flushD_SE)
+ mcr p15, 0, r0, c8, c6, 1 /* flush D tlb single entry */
+ mcr p15, 0, r0, c7, c10, 4 /* drain write buffer */
+ mov pc, lr
+
+
+/* STUBS - implement these */
+ENTRY(armv7_icache_sync_all)
+ENTRY(armv7_icache_sync_range)
+ENTRY(armv7_dcache_wbinv_all)
+ENTRY(armv7_dcache_wbinv_range)
+ENTRY(armv7_dcache_wb_range)
+ENTRY(armv7_idcache_wbinv_all)
+ENTRY(armv7_idcache_wbinv_range)
+ mov pc, lr
+
+/*
+ * Context switch.
+ *
+ * These is the CPU-specific parts of the context switcher cpu_switch()
+ * These functions actually perform the TTB reload.
+ *
+ * NOTE: Special calling convention
+ * r1, r4-r13 must be preserved
+ */
+ENTRY(armv7_context_switch)
+ /*
+ * We can assume that the caches will only contain kernel addresses
+ * at this point. So no need to flush them again.
+ */
+ mcr p15, 0, r0, c7, c10, 4 /* drain the write buffer */
+ mcr p15, 0, r0, c2, c0, 0 /* set the new TTB */
+ mcr p15, 0, r0, c8, c7, 0 /* and flush the I+D tlbs */
+
+ /* Paranoia -- make sure the pipeline is empty. */
+ nop
+ nop
+ nop
+ mov pc, lr
+
+/* XXX The following macros should probably be moved to asm.h */
+#define _DATA_OBJECT(x) .globl x; .type x,_ASM_TYPE_OBJECT; x:
+#define C_OBJECT(x) _DATA_OBJECT(_C_LABEL(x))
+
+ .align 2
+C_OBJECT(armv7_dcache_sets_max)
+ .word 0
+C_OBJECT(armv7_dcache_index_max)
+ .word 0
+C_OBJECT(armv7_dcache_sets_inc)
+ .word 0
+C_OBJECT(armv7_dcache_index_inc)
+ .word 0