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mw_debug: Add "save" function to save memory to a file

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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2020-06-04 20:25:57 +10:00
parent 3167515069
commit 3c99e6c31f
1 changed files with 48 additions and 2 deletions
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50
scripts/mw_debug/mw_debug.c
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@@ -175,7 +175,11 @@ static int sim_command(uint8_t op, uint8_t addr, uint64_t *data)
printf("%02x ", buf[i]);
printf("\n");
}
write(sim_fd, buf, p - buf);
r = write(sim_fd, buf, p - buf);
if (r < 0) {
fprintf(stderr, "failed to write sim command\n");
return -1;
}
r = read(sim_fd, buf, sizeof(buf));
if (0 && r > 0) {
int i;
@@ -506,6 +510,37 @@ static void load(const char *filename, uint64_t addr)
if (!(count % 1024))
printf("%x...\n", count);
}
close(fd);
printf("%x done.\n", count);
}
static void save(const char *filename, uint64_t addr, uint64_t size)
{
uint64_t data;
int fd, rc, count;
fd = open(filename, O_WRONLY | O_CREAT, 00666);
if (fd < 0) {
fprintf(stderr, "Failed to open '%s': %s\n", filename, strerror(errno));
exit(1);
}
check(dmi_write(DBG_WB_CTRL, 0x7ff), "writing WB_CTRL");
check(dmi_write(DBG_WB_ADDR, addr), "writing WB_ADDR");
count = 0;
for (;;) {
check(dmi_read(DBG_WB_DATA, &data), "reading WB_DATA");
rc = write(fd, &data, 8);
if (rc <= 0) {
fprintf(stderr, "Failed to write: %s\n", strerror(errno));
break;
}
count += 8;
if (!(count % 1024))
printf("%x...\n", count);
if (count >= size)
break;
}
close(fd);
printf("%x done.\n", count);
}
@@ -523,9 +558,10 @@ static void usage(const char *cmd)
fprintf(stderr, "\n");
fprintf(stderr, " Memory:\n");
fprintf(stderr, " mr <hex addr>\n");
fprintf(stderr, " mr <hex addr> [count]\n");
fprintf(stderr, " mw <hex addr> <hex value>\n");
fprintf(stderr, " load <file> [addr] If omitted address is 0\n");
fprintf(stderr, " save <file> <addr> <size>\n");
fprintf(stderr, "\n");
fprintf(stderr, " Registers:\n");
@@ -651,6 +687,16 @@ int main(int argc, char *argv[])
if (((i+1) < argc) && isdigit(argv[i+1][0]))
addr = strtoul(argv[++i], NULL, 16);
load(filename, addr);
} else if (strcmp(argv[i], "save") == 0) {
const char *filename;
uint64_t addr, size;
if ((i+3) >= argc)
usage(argv[0]);
filename = argv[++i];
addr = strtoul(argv[++i], NULL, 16);
size = strtoul(argv[++i], NULL, 16);
save(filename, addr, size);
} else if (strcmp(argv[i], "gpr") == 0) {
uint64_t reg, count = 1;