cc201759b6
Add support for pstore/ramoops now that DRAM content is preserved over reboot on MT7622. On each boot, check pstore and boot to recovery image in case there are records stored in it. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
79 lines
2.2 KiB
Diff
79 lines
2.2 KiB
Diff
--- a/cmd/pstore.c
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+++ b/cmd/pstore.c
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@@ -207,6 +207,58 @@ static int pstore_set(struct cmd_tbl *cm
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}
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/**
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+ * pstore_check() - Check for pstore records
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+ * @cmdtp: Command data struct pointer
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+ * @flag: Command flag
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+ * @argc: Command-line argument count
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+ * @argv: Array of command-line arguments
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+ *
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+ * Return: 0 if there are records in pstore, 1 otherwise
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+ */
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+static int pstore_check(struct cmd_tbl *cmdtp, int flag, int argc,
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+ char * const argv[])
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+{
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+ phys_addr_t ptr;
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+ char *buffer;
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+ u32 size;
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+ int header_len = 0;
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+ bool compressed;
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+
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+ if (pstore_length == 0) {
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+ printf("Please set PStore configuration\n");
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+ return CMD_RET_USAGE;
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+ }
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+
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+ if (buffer_size == 0)
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+ pstore_init_buffer_size();
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+
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+ buffer = malloc_cache_aligned(buffer_size);
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+
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+ ptr = pstore_addr;
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+ phys_addr_t ptr_end = ptr + pstore_length - pstore_pmsg_size
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+ - pstore_ftrace_size - pstore_console_size;
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+
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+ while (ptr < ptr_end) {
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+ size = pstore_get_buffer(PERSISTENT_RAM_SIG, ptr,
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+ pstore_record_size, buffer);
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+ ptr += pstore_record_size;
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+
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+ if (size == 0)
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+ continue;
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+
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+ header_len = pstore_read_kmsg_hdr(buffer, &compressed);
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+ if (header_len == 0)
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+ continue;
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+
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+ free(buffer);
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+ return 0;
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+ }
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+
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+ free(buffer);
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+ return 1;
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+}
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+
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+/**
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* pstore_print_buffer() - Print buffer
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* @type: buffer type
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* @buffer: buffer to print
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@@ -458,6 +510,7 @@ static int pstore_save(struct cmd_tbl *c
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static struct cmd_tbl cmd_pstore_sub[] = {
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U_BOOT_CMD_MKENT(set, 8, 0, pstore_set, "", ""),
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+ U_BOOT_CMD_MKENT(check, 1, 0, pstore_check, "", ""),
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U_BOOT_CMD_MKENT(display, 3, 0, pstore_display, "", ""),
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U_BOOT_CMD_MKENT(save, 4, 0, pstore_save, "", ""),
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};
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@@ -531,6 +584,8 @@ U_BOOT_CMD(pstore, 10, 0, do_pstore,
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" 'pmsg-size' is the size of the user space logs record.\n"
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" 'ecc-size' enables/disables ECC support and specifies ECC buffer size in\n"
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" bytes (0 disables it, 1 is a special value, means 16 bytes ECC).\n"
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+ "pstore check\n"
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+ "- Returns true if there are records in pstore.\n"
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"pstore display [record-type] [nb]\n"
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"- Display existing records in pstore reserved memory. A 'record-type' can\n"
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" be given to only display records of this kind. 'record-type' can be one\n"
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