diff options
Diffstat (limited to 'arch/mips/mach-mtmips/cpu.c')
| -rw-r--r-- | arch/mips/mach-mtmips/cpu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/mips/mach-mtmips/cpu.c b/arch/mips/mach-mtmips/cpu.c index b0a6397d68..7afc2c5940 100644 --- a/arch/mips/mach-mtmips/cpu.c +++ b/arch/mips/mach-mtmips/cpu.c @@ -68,3 +68,29 @@ int print_cpuinfo(void) return 0; } + +int last_stage_init(void) +{ + void *src, *dst; + + src = malloc(SZ_64K); + dst = malloc(SZ_64K); + if (!src || !dst) { + printf("Can't allocate buffer for cache cleanup copy!\n"); + return 0; + } + + /* + * It has been noticed, that sometimes the d-cache is not in a + * "clean-state" when U-Boot is running on MT7688. This was + * detected when using the ethernet driver (which uses d-cache) + * and a TFTP command does not complete. Copying an area of 64KiB + * in DDR at a very late bootup time in U-Boot, directly before + * calling into the prompt, seems to fix this issue. + */ + memcpy(dst, src, SZ_64K); + free(src); + free(dst); + + return 0; +} |