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pstore: Support already existing reserved-memory node

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The pstore command tries to create a reserved-memory node but fails if
it is already present with:

    Add 'reserved-memory' node failed: FDT_ERR_EXISTS

This patch creates the node only if it does not exist and adapts the reg
values sizes depending on already present #address-cells and #size-cells
values.

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
This commit is contained in:
Detlev Casanova 2022-02-07 11:02:30 -05:00 committed by Tom Rini
parent 162c22bfbc
commit ac52cba63f
1 changed files with 34 additions and 5 deletions
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35
cmd/pstore.c
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@ -11,6 +11,7 @@
#include <mapmem.h> #include <mapmem.h>
#include <memalign.h> #include <memalign.h>
#include <part.h> #include <part.h>
#include <fdt_support.h>
struct persistent_ram_buffer { struct persistent_ram_buffer {
u32 sig; u32 sig;
@ -485,6 +486,8 @@ void fdt_fixup_pstore(void *blob)
{ {
char node[32]; char node[32];
int nodeoffset; /* node offset from libfdt */ int nodeoffset; /* node offset from libfdt */
u32 addr_cells;
u32 size_cells;
nodeoffset = fdt_path_offset(blob, "/"); nodeoffset = fdt_path_offset(blob, "/");
if (nodeoffset < 0) { if (nodeoffset < 0) {
@ -493,14 +496,18 @@ void fdt_fixup_pstore(void *blob)
return; return;
} }
nodeoffset = fdt_add_subnode(blob, nodeoffset, "reserved-memory"); nodeoffset = fdt_find_or_add_subnode(blob, nodeoffset, "reserved-memory");
if (nodeoffset < 0) { if (nodeoffset < 0) {
log_err("Add 'reserved-memory' node failed: %s\n", log_err("Add 'reserved-memory' node failed: %s\n",
fdt_strerror(nodeoffset)); fdt_strerror(nodeoffset));
return; return;
} }
fdt_setprop_u32(blob, nodeoffset, "#address-cells", 2);
fdt_setprop_u32(blob, nodeoffset, "#size-cells", 2); addr_cells = fdt_getprop_u32_default_node(blob, nodeoffset, 0, "#address-cells", 2);
size_cells = fdt_getprop_u32_default_node(blob, nodeoffset, 0, "#size-cells", 2);
fdt_setprop_u32(blob, nodeoffset, "#address-cells", addr_cells);
fdt_setprop_u32(blob, nodeoffset, "#size-cells", size_cells);
fdt_setprop_empty(blob, nodeoffset, "ranges"); fdt_setprop_empty(blob, nodeoffset, "ranges");
sprintf(node, "ramoops@%llx", (unsigned long long)pstore_addr); sprintf(node, "ramoops@%llx", (unsigned long long)pstore_addr);
@ -509,14 +516,36 @@ void fdt_fixup_pstore(void *blob)
log_err("Add '%s' node failed: %s\n", node, fdt_strerror(nodeoffset)); log_err("Add '%s' node failed: %s\n", node, fdt_strerror(nodeoffset));
return; return;
} }
fdt_setprop_string(blob, nodeoffset, "compatible", "ramoops"); fdt_setprop_string(blob, nodeoffset, "compatible", "ramoops");
if (addr_cells == 1) {
fdt_setprop_u32(blob, nodeoffset, "reg", pstore_addr);
} else if (addr_cells == 2) {
fdt_setprop_u64(blob, nodeoffset, "reg", pstore_addr); fdt_setprop_u64(blob, nodeoffset, "reg", pstore_addr);
} else {
log_err("Unsupported #address-cells: %u\n", addr_cells);
goto clean_ramoops;
}
if (size_cells == 1) {
// Let's consider that the pstore_length fits in a 32 bits value
fdt_appendprop_u32(blob, nodeoffset, "reg", pstore_length);
} else if (size_cells == 2) {
fdt_appendprop_u64(blob, nodeoffset, "reg", pstore_length); fdt_appendprop_u64(blob, nodeoffset, "reg", pstore_length);
} else {
log_err("Unsupported #size-cells: %u\n", addr_cells);
goto clean_ramoops;
}
fdt_setprop_u32(blob, nodeoffset, "record-size", pstore_record_size); fdt_setprop_u32(blob, nodeoffset, "record-size", pstore_record_size);
fdt_setprop_u32(blob, nodeoffset, "console-size", pstore_console_size); fdt_setprop_u32(blob, nodeoffset, "console-size", pstore_console_size);
fdt_setprop_u32(blob, nodeoffset, "ftrace-size", pstore_ftrace_size); fdt_setprop_u32(blob, nodeoffset, "ftrace-size", pstore_ftrace_size);
fdt_setprop_u32(blob, nodeoffset, "pmsg-size", pstore_pmsg_size); fdt_setprop_u32(blob, nodeoffset, "pmsg-size", pstore_pmsg_size);
fdt_setprop_u32(blob, nodeoffset, "ecc-size", pstore_ecc_size); fdt_setprop_u32(blob, nodeoffset, "ecc-size", pstore_ecc_size);
clean_ramoops:
fdt_del_node_and_alias(blob, node);
} }
U_BOOT_CMD(pstore, 10, 0, do_pstore, U_BOOT_CMD(pstore, 10, 0, do_pstore,