summaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/ppc4xx/cache.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/cpu/ppc4xx/cache.S')
-rw-r--r--arch/powerpc/cpu/ppc4xx/cache.S188
1 files changed, 0 insertions, 188 deletions
diff --git a/arch/powerpc/cpu/ppc4xx/cache.S b/arch/powerpc/cpu/ppc4xx/cache.S
deleted file mode 100644
index 93e8366..0000000
--- a/arch/powerpc/cpu/ppc4xx/cache.S
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * This file contains miscellaneous low-level functions.
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
- * and Paul Mackerras.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <config.h>
-#include <config.h>
-#include <asm/ppc4xx.h>
-#include <ppc_asm.tmpl>
-#include <ppc_defs.h>
-#include <asm/cache.h>
-#include <asm/mmu.h>
-
-/*
- * Flush instruction cache.
- */
-_GLOBAL(invalidate_icache)
- iccci r0,r0
- isync
- blr
-
-/*
- * Write any modified data cache blocks out to memory
- * and invalidate the corresponding instruction cache blocks.
- *
- * flush_icache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(flush_icache_range)
- li r5,L1_CACHE_BYTES-1
- andc r3,r3,r5
- subf r4,r3,r4
- add r4,r4,r5
- srwi. r4,r4,L1_CACHE_SHIFT
- beqlr
- mtctr r4
- mr r6,r3
-1: dcbst 0,r3
- addi r3,r3,L1_CACHE_BYTES
- bdnz 1b
- sync /* wait for dcbst's to get to ram */
- mtctr r4
-2: icbi 0,r6
- addi r6,r6,L1_CACHE_BYTES
- bdnz 2b
- sync /* additional sync needed on g4 */
- isync
- blr
-
-/*
- * Write any modified data cache blocks out to memory.
- * Does not invalidate the corresponding cache lines (especially for
- * any corresponding instruction cache).
- *
- * clean_dcache_range(unsigned long start, unsigned long stop)
- */
-_GLOBAL(clean_dcache_range)
- li r5,L1_CACHE_BYTES-1
- andc r3,r3,r5
- subf r4,r3,r4
- add r4,r4,r5
- srwi. r4,r4,L1_CACHE_SHIFT
- beqlr
- mtctr r4
-
-1: dcbst 0,r3
- addi r3,r3,L1_CACHE_BYTES
- bdnz 1b
- sync /* wait for dcbst's to get to ram */
- blr
-
-/*
- * 40x cores have 8K or 16K dcache and 32 byte line size.
- * 44x has a 32K dcache and 32 byte line size.
- * 8xx has 1, 2, 4, 8K variants.
- * For now, cover the worst case of the 44x.
- * Must be called with external interrupts disabled.
- */
-#define CACHE_NWAYS 64
-#define CACHE_NLINES 32
-
-_GLOBAL(flush_dcache)
- li r4,(2 * CACHE_NWAYS * CACHE_NLINES)
- mtctr r4
- lis r5,0
-1: lwz r3,0(r5) /* Load one word from every line */
- addi r5,r5,L1_CACHE_BYTES
- bdnz 1b
- sync
- blr
-
-_GLOBAL(invalidate_dcache)
- addi r6,0,0x0000 /* clear GPR 6 */
- /* Do loop for # of dcache congruence classes. */
- lis r7,(CONFIG_SYS_DCACHE_SIZE / L1_CACHE_BYTES / 2)@ha /* TBS for large sized cache */
- ori r7,r7,(CONFIG_SYS_DCACHE_SIZE / L1_CACHE_BYTES / 2)@l
- /* NOTE: dccci invalidates both */
- mtctr r7 /* ways in the D cache */
-..dcloop:
- dccci 0,r6 /* invalidate line */
- addi r6,r6,L1_CACHE_BYTES /* bump to next line */
- bdnz ..dcloop
- sync
- blr
-
-/*
- * Cache functions.
- *
- * NOTE: currently the 440s run with dcache _disabled_ once relocated to DRAM,
- * although for some cache-ralated calls stubs have to be provided to satisfy
- * symbols resolution.
- * Icache-related functions are used in POST framework.
- *
- */
-#ifdef CONFIG_440
-
- .globl dcache_disable
- .globl dcache_enable
- .globl icache_disable
- .globl icache_enable
-dcache_disable:
-dcache_enable:
-icache_disable:
-icache_enable:
- blr
-
- .globl dcache_status
- .globl icache_status
-dcache_status:
-icache_status:
- mr r3, 0
- blr
-
-#else /* CONFIG_440 */
-
- .globl icache_enable
-icache_enable:
- mflr r8
- bl invalidate_icache
- mtlr r8
- isync
- addis r3,r0, 0xc000 /* set bit 0 */
- mticcr r3
- blr
-
- .globl icache_disable
-icache_disable:
- addis r3,r0, 0x0000 /* clear bit 0 */
- mticcr r3
- isync
- blr
-
- .globl icache_status
-icache_status:
- mficcr r3
- srwi r3, r3, 31 /* >>31 => select bit 0 */
- blr
-
- .globl dcache_enable
-dcache_enable:
- mflr r8
- bl invalidate_dcache
- mtlr r8
- isync
- addis r3,r0, 0x8000 /* set bit 0 */
- mtdccr r3
- blr
-
- .globl dcache_disable
-dcache_disable:
- mflr r8
- bl flush_dcache
- mtlr r8
- addis r3,r0, 0x0000 /* clear bit 0 */
- mtdccr r3
- blr
-
- .globl dcache_status
-dcache_status:
- mfdccr r3
- srwi r3, r3, 31 /* >>31 => select bit 0 */
- blr
-
-#endif /* CONFIG_440 */