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-rw-r--r--arch/mips/mips-boards/generic/memory.c50
1 files changed, 26 insertions, 24 deletions
diff --git a/arch/mips/mips-boards/generic/memory.c b/arch/mips/mips-boards/generic/memory.c
index c89fcf9e9c2..be80c5dd4a0 100644
--- a/arch/mips/mips-boards/generic/memory.c
+++ b/arch/mips/mips-boards/generic/memory.c
@@ -47,43 +47,45 @@ static char *mtypes[3] = {
};
#endif
+/* determined physical memory size, not overridden by command line args */
+unsigned long physical_memsize = 0L;
+
struct prom_pmemblock * __init prom_getmdesc(void)
{
char *memsize_str;
unsigned int memsize;
char cmdline[CL_SIZE], *ptr;
- /* Check the command line first for a memsize directive */
- strcpy(cmdline, arcs_cmdline);
- ptr = strstr(cmdline, "memsize=");
- if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
- ptr = strstr(ptr, " memsize=");
-
- if (ptr) {
- memsize = memparse(ptr + 8, &ptr);
- }
- else {
- /* otherwise look in the environment */
- memsize_str = prom_getenv("memsize");
- if (!memsize_str) {
- prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
- memsize = 0x02000000;
- } else {
+ /* otherwise look in the environment */
+ memsize_str = prom_getenv("memsize");
+ if (!memsize_str) {
+ prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
+ physical_memsize = 0x02000000;
+ } else {
#ifdef DEBUG
- prom_printf("prom_memsize = %s\n", memsize_str);
+ prom_printf("prom_memsize = %s\n", memsize_str);
#endif
- memsize = simple_strtol(memsize_str, NULL, 0);
- }
+ physical_memsize = simple_strtol(memsize_str, NULL, 0);
}
#ifdef CONFIG_CPU_BIG_ENDIAN
- /*
- * SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last
- * word of physical memory
- */
- memsize -= PAGE_SIZE;
+ /* SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last
+ word of physical memory */
+ physical_memsize -= PAGE_SIZE;
#endif
+ /* Check the command line for a memsize directive that overrides
+ the physical/default amount */
+ strcpy(cmdline, arcs_cmdline);
+ ptr = strstr(cmdline, "memsize=");
+ if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
+ ptr = strstr(ptr, " memsize=");
+
+ if (ptr)
+ memsize = memparse(ptr + 8, &ptr);
+ else
+ memsize = physical_memsize;
+
memset(mdesc, 0, sizeof(mdesc));
mdesc[0].type = yamon_dontuse;