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-rw-r--r--cmd/cache.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/cmd/cache.c b/cmd/cache.c
new file mode 100644
index 0000000..37ab345
--- /dev/null
+++ b/cmd/cache.c
@@ -0,0 +1,106 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Cache support: switch on or off, get status
+ */
+#include <common.h>
+#include <command.h>
+#include <linux/compiler.h>
+
+static int parse_argv(const char *);
+
+void __weak invalidate_icache_all(void)
+{
+ /* please define arch specific invalidate_icache_all */
+ puts("No arch specific invalidate_icache_all available!\n");
+}
+
+static int do_icache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ switch (argc) {
+ case 2: /* on / off */
+ switch (parse_argv(argv[1])) {
+ case 0:
+ icache_disable();
+ break;
+ case 1:
+ icache_enable();
+ break;
+ case 2:
+ invalidate_icache_all();
+ break;
+ }
+ break;
+ case 1: /* get status */
+ printf("Instruction Cache is %s\n",
+ icache_status() ? "ON" : "OFF");
+ return 0;
+ default:
+ return CMD_RET_USAGE;
+ }
+ return 0;
+}
+
+void __weak flush_dcache_all(void)
+{
+ puts("No arch specific flush_dcache_all available!\n");
+ /* please define arch specific flush_dcache_all */
+}
+
+static int do_dcache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ switch (argc) {
+ case 2: /* on / off */
+ switch (parse_argv(argv[1])) {
+ case 0:
+ dcache_disable();
+ break;
+ case 1:
+ dcache_enable();
+ break;
+ case 2:
+ flush_dcache_all();
+ break;
+ }
+ break;
+ case 1: /* get status */
+ printf("Data (writethrough) Cache is %s\n",
+ dcache_status() ? "ON" : "OFF");
+ return 0;
+ default:
+ return CMD_RET_USAGE;
+ }
+ return 0;
+}
+
+static int parse_argv(const char *s)
+{
+ if (strcmp(s, "flush") == 0)
+ return 2;
+ else if (strcmp(s, "on") == 0)
+ return 1;
+ else if (strcmp(s, "off") == 0)
+ return 0;
+
+ return -1;
+}
+
+
+U_BOOT_CMD(
+ icache, 2, 1, do_icache,
+ "enable or disable instruction cache",
+ "[on, off, flush]\n"
+ " - enable, disable, or flush instruction cache"
+);
+
+U_BOOT_CMD(
+ dcache, 2, 1, do_dcache,
+ "enable or disable data cache",
+ "[on, off, flush]\n"
+ " - enable, disable, or flush data (writethrough) cache"
+);