The mfill command writes the value of a counter to a memory area.
The mcheck command verifies the memory area against the counter value.
Those commands are useful for debugging memory/framebuffer controller.
The configuration option is CONFIG_MFILL and this only takes effect if
the memory commands are activated globally (CONFIG_CMD_MEM).
Signed-off-by: Benoît Monin <bmonin <at> adeneo.eu>
---
README | 17 +++++++-
common/cmd_mem.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 143 insertions(+), 1 deletions(-)
diff --git a/README b/README
index 43fb1c0..d0a636e 100644
--- a/README
+++ b/README
@@ -627,7 +627,7 @@ The following options need to be configured:
CONFIG_CMD_LOADB loadb
CONFIG_CMD_LOADS loads
CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base,
- loop, loopw, mtest
+ loop, loopw, mtest, mfill, mcheck
CONFIG_CMD_MISC Misc functions like sleep etc
CONFIG_CMD_MMC * MMC memory mapped support
CONFIG_CMD_MII * MII utility commands
@@ -2678,6 +2678,21 @@ Low Level (hardware related) configuration options:
This only takes effect if the memory commands are activated
globally (CONFIG_CMD_MEM).
+- CONFIG_MFILL
+ Add the "mfill" and "mcheck" memory commands. "mfill" writes
+ a memory area with the value of a counter. "mcheck" checks
+ a memory area against the value of a counter and can be run
+ after mfill.
+
+ (mfill/mcheck)[.b, .w, .l] address count [init]
+ [.b, .w, .l] : Access size (default to l).
+ address : Address in hexadecimal.
+ count : Number of elements to write in hex.
+ [init] : Initial value of the counter (default to 0).
+
+ This only takes effect if the memory commands are activated
+ globally (CONFIG_CMD_MEM).
+
- CONFIG_SKIP_LOWLEVEL_INIT
- CONFIG_SKIP_RELOCATE_UBOOT
diff --git a/common/cmd_mem.c b/common/cmd_mem.c
index 2d4fc2a..0191687 100644
--- a/common/cmd_mem.c
+++ b/common/cmd_mem.c
@@ -943,6 +943,117 @@ int do_mem_mtest (cmd_tbl_t *cmdtp, int flag, int argc,
char *argv[])
return rcode;
}
+#ifdef CONFIG_MFILL
+/* Memory fill
+ *
+ * Write a memory area with the value of a counter
+ *
+ * mfill{.b, .w, .l} {address} {count} {init}
+ */
+static int do_mem_mfill(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ volatile void* addr;
+ ulong count;
+ ulong val;
+ int size;
+
+ if (argc < 3) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+ /* Scan for data size */
+ if ((size = cmd_get_data_size(argv[0], 4)) < 0)
+ return 1;
+ addr = (void*)simple_strtoul(argv[1], NULL, 16);
+ addr += base_address;
+ count = simple_strtoul(argv[2], NULL, 16);
+ if (argc == 4) {
+ val = simple_strtoul(argv[3], NULL, 16);
+ } else {
+ val = 0;
+ }
+ if (size == 4) {
+ while (count-- > 0) {
+ *((ulong*)addr) = (ulong)val++;
+ addr += size;
+ }
+ } else if (size == 2) {
+ while (count-- > 0) {
+ *((ushort*)addr) = (ushort)val++;
+ addr += size;
+ }
+ } else {
+ while (count-- > 0) {
+ *((uchar*)addr) = (uchar)val++;
+ addr += size;
+ }
+ }
+ return 0;
+}
+
+/* Memory check
+ *
+ * Check a memory area against the value of a counter
+ * Run this after mfill.
+ *
+ * mcheck{.b, .w, .l} {address} {count} {init}
+ */
+static int do_mem_mcheck(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ volatile void* addr;
+ ulong count;
+ ulong val;
+ int size;
+
+ if (argc < 3) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+ /* Scan for data size */
+ if ((size = cmd_get_data_size(argv[0], 4)) < 0)
+ return 1;
+ addr = (void*)simple_strtoul(argv[1], NULL, 16);
+ addr += base_address;
+ count = simple_strtoul(argv[2], NULL, 16);
+ if (argc == 4) {
+ val = simple_strtoul(argv[3], NULL, 16);
+ } else {
+ val = 0;
+ }
+ if (size == 4) {
+ while (count-- > 0) {
+ if (*((ulong*)addr) != (ulong)val) {
+ printf ("Mem error @ 0x%p: found 0x%08lx,
expected 0x%08lx\n",
+ addr, *((ulong*)addr), (ulong)val);
+ if (ctrlc()) return 1;
+ }
+ addr += size;
+ val++;
+ }
+ } else if (size == 2) {
+ while (count-- > 0) {
+ if (*((ushort*)addr) != (ushort)val) {
+ printf ("Mem error @ 0x%p: found 0x%04x,
expected 0x%04x\n",
+ addr, *((ushort*)addr), (ushort)val);
+ if (ctrlc()) return 1;
+ }
+ addr += size;
+ val++;
+ }
+ } else {
+ while (count-- > 0) {
+ if (*((uchar*)addr) != (uchar)val) {
+ printf ("Mem error @ 0x%p: found 0x%02x,
expected 0x%02x\n",
+ addr, *((uchar*)addr), (uchar)val);
+ if (ctrlc()) return 1;
+ }
+ addr += size;
+ val++;
+ }
+ }
+ return 0;
+}
+#endif /* CONFIG_MFILL */
/* Modify memory.
*
@@ -1256,6 +1367,22 @@ U_BOOT_CMD(
" - simple RAM read/write test\n"
);
+#ifdef CONFIG_MFILL
+U_BOOT_CMD(
+ mfill, 4, 1, do_mem_mfill,
+ "mfill - Fill memory with the value of a counter\n",
+ "[.b, .w, .l] address count [init]\n"
+ " - Fill memory range with the value of a counter\n"
+);
+
+U_BOOT_CMD(
+ mcheck, 4, 1, do_mem_mcheck,
+ "mcheck - Check memory after mfill\n",
+ "[.b, .w, .l] address count [init]\n"
+ " - Check memory range after mfill\n"
+);
+#endif /* CONFIG_MFILL */
+
#ifdef CONFIG_MX_CYCLIC
U_BOOT_CMD(
mdc, 4, 1, do_mem_mdc,
--
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