When we need the copied code/data in the main memory, we can flush the cache now. It uses the existing function flush_cache. Syntax is
flush_cache <addr> <size>
The addr and size are given in hexadecimal. Like memory command, there is no sanity check for the parameters.
Signed-off-by: York Sun yorksun@freescale.com --- common/cmd_cache.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/common/cmd_cache.c b/common/cmd_cache.c index 5512f92..93b7337 100644 --- a/common/cmd_cache.c +++ b/common/cmd_cache.c @@ -94,6 +94,29 @@ int do_dcache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 0; }
+void __weak flush_cache(ulong addr, ulong size) +{ + puts("No arch specific flush_cache available!\n"); + /* please define arch specific flush_cache */ +} + +int do_flush_cache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + ulong addr, size; + + switch (argc) { + case 3: + addr = simple_strtoul(argv[1], NULL, 16); + size = simple_strtoul(argv[2], NULL, 16); + flush_cache(addr, size); + break; + default: + return cmd_usage(cmdtp); + } + return 0; + +} + static int parse_argv(const char *s) { if (strcmp(s, "flush") == 0) @@ -120,3 +143,10 @@ U_BOOT_CMD( "[on, off, flush]\n" " - enable, disable, or flush data (writethrough) cache" ); + +U_BOOT_CMD( + flush_cache, 3, 0, do_flush_cache, + "flush cache for a range", + "<addr> <size>\n" + " - flush cache for specificed range" +);