diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc83xx/start.S')
| -rw-r--r-- | arch/powerpc/cpu/mpc83xx/start.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc83xx/start.S b/arch/powerpc/cpu/mpc83xx/start.S index c366f61..ff31289 100644 --- a/arch/powerpc/cpu/mpc83xx/start.S +++ b/arch/powerpc/cpu/mpc83xx/start.S @@ -263,6 +263,29 @@ in_flash: lis r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l + /* r4 = end of GD area */ + addi r4, r3, GENERATED_GBL_DATA_SIZE + + /* Zero GD area */ + li r0, 0 +1: + subi r4, r4, 1 + stb r0, 0(r4) + cmplw r3, r4 + bne 1b + +#ifdef CONFIG_SYS_MALLOC_F_LEN + +#if CONFIG_SYS_MALLOC_F_LEN + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE +#error "CONFIG_SYS_MALLOC_F_LEN too large to fit into initial RAM." +#endif + + /* r3 = new stack pointer / pre-reloc malloc area */ + subi r3, r3, CONFIG_SYS_MALLOC_F_LEN + + /* Set pointer to pre-reloc malloc area in GD */ + stw r3, GD_MALLOC_BASE(r4) +#endif li r0, 0 /* Make room for stack frame header and */ stwu r0, -4(r3) /* clear final stack frame so that */ stwu r0, -4(r3) /* stack backtraces terminate cleanly */ |