diff options
Diffstat (limited to 'roms/u-boot/arch/powerpc/cpu/ppc4xx/kgdb.S')
| -rw-r--r-- | roms/u-boot/arch/powerpc/cpu/ppc4xx/kgdb.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/roms/u-boot/arch/powerpc/cpu/ppc4xx/kgdb.S b/roms/u-boot/arch/powerpc/cpu/ppc4xx/kgdb.S new file mode 100644 index 00000000..f274c5d5 --- /dev/null +++ b/roms/u-boot/arch/powerpc/cpu/ppc4xx/kgdb.S @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2000 Murray Jensen <Murray.Jensen@cmst.csiro.au> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <command.h> +#include <asm/ppc4xx.h> +#include <version.h> + +#define CONFIG_405GP 1 /* needed for Linux kernel header files */ + +#include <ppc_asm.tmpl> +#include <ppc_defs.h> + +#include <asm/cache.h> +#include <asm/mmu.h> + +#if defined(CONFIG_CMD_KGDB) + /* + * cache flushing routines for kgdb + */ + + .globl kgdb_flush_cache_all +kgdb_flush_cache_all: + /* icache */ + iccci r0,r0 /* iccci invalidates the entire I cache */ + /* dcache */ + addi r6,0,0x0000 /* clear GPR 6 */ + addi r7,r0, 128 /* do loop for # of dcache lines */ + /* NOTE: dccci invalidates both */ + mtctr r7 /* ways in the D cache */ +..dcloop: + dccci 0,r6 /* invalidate line */ + addi r6,r6, 32 /* bump to next line */ + bdnz ..dcloop + blr + + .globl kgdb_flush_cache_range +kgdb_flush_cache_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 + blr + +#endif |