From: Giorgio Dal Molin <giorgio.nicole@xxxxxxxx>
The command 'check data' can be used in the DCD table for an IMX soc
to test the content of memory addresses, typically registers of some
soc controller.
This command supports an optional 'count' parameter that, when given,
tells the ROM code how many times at most it's allowed to poll the
memory address to meet the given logical condition. If the 'count'
is not present in the command the ROM polls indefinitely.
(See the IMX7D Ref. Manual at §6.6.7.2.2).
With this patch it's possible to have the following command in the DCD:
...
check 32 until_any_bit_set 0x307900c4 0x1 500
...
Signed-off-by: Giorgio Dal Molin <giorgio.nicole@xxxxxxxx>
---
arch/arm/mach-imx/include/mach/imx-header.h | 2 +-
scripts/imx/imx-image.c | 4 +++-
scripts/imx/imx.c | 10 +++++++---
3 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-imx/include/mach/imx-header.h b/arch/arm/mach-imx/include/mach/imx-header.h
index dc8e2eee2..57644067c 100644
--- a/arch/arm/mach-imx/include/mach/imx-header.h
+++ b/arch/arm/mach-imx/include/mach/imx-header.h
@@ -106,7 +106,7 @@ struct config_data {
uint32_t first_opcode;
int cpu_type;
int (*check)(const struct config_data *data, uint32_t cmd,
- uint32_t addr, uint32_t mask);
+ uint32_t addr, uint32_t mask, uint32_t count);
int (*write_mem)(const struct config_data *data, uint32_t addr,
uint32_t val, int width, int set_bits, int clear_bits);
int (*nop)(const struct config_data *data);
diff --git a/scripts/imx/imx-image.c b/scripts/imx/imx-image.c
index ec7444a77..0cd970ea8 100644
--- a/scripts/imx/imx-image.c
+++ b/scripts/imx/imx-image.c
@@ -495,7 +495,7 @@ static void write_dcd(const char *outfile)
}
static int check(const struct config_data *data, uint32_t cmd, uint32_t addr,
- uint32_t mask)
+ uint32_t mask, uint32_t count)
{
if (data->header_version != 2) {
fprintf(stderr, "DCD check command is not available or "
@@ -512,6 +512,8 @@ static int check(const struct config_data *data, uint32_t cmd, uint32_t addr,
dcdtable[curdcd++] = htobe32(cmd);
dcdtable[curdcd++] = htobe32(addr);
dcdtable[curdcd++] = htobe32(mask);
+ if ( ((cmd & (0xffff<<8)) >> 8) > sizeof(uint32_t)*3 )
+ dcdtable[curdcd++] = htobe32(count);
return 0;
}
diff --git a/scripts/imx/imx.c b/scripts/imx/imx.c
index ea576c22d..879bd897e 100644
--- a/scripts/imx/imx.c
+++ b/scripts/imx/imx.c
@@ -92,7 +92,7 @@ static void do_cmd_check_usage(void)
static int do_cmd_check(struct config_data *data, int argc, char *argv[])
{
- uint32_t addr, mask, cmd;
+ uint32_t addr, mask, cmd, count=0, len=3;
int i, width;
const char *scmd;
@@ -108,6 +108,10 @@ static int do_cmd_check(struct config_data *data, int argc, char *argv[])
scmd = argv[2];
addr = strtoul(argv[3], NULL, 0);
mask = strtoul(argv[4], NULL, 0);
+ if (argc > 5) {
+ count = strtoul(argv[5], NULL, 0);
+ ++len;
+ }
switch (width) {
case 1:
@@ -129,9 +133,9 @@ static int do_cmd_check(struct config_data *data, int argc, char *argv[])
return -EINVAL;
}
- cmd = (TAG_CHECK << 24) | (i << 3) | width | ((sizeof(uint32_t) * 3) << 8);
+ cmd = (TAG_CHECK << 24) | (i << 3) | width | ((sizeof(uint32_t) * len) << 8);
- return data->check(data, cmd, addr, mask);
+ return data->check(data, cmd, addr, mask, count);
}
static int do_cmd_nop(struct config_data *data, int argc, char *argv[])
--
2.27.0
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