diff options
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 8b6f7a99cce..eb23ac92abb 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -559,6 +559,35 @@ void __init early_init_dt_setup_initrd_arch(unsigned long start, } #endif +static void __init early_reserve_mem_dt(void) +{ + unsigned long i, len, dt_root; + const __be32 *prop; + + dt_root = of_get_flat_dt_root(); + + prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len); + + if (!prop) + return; + + DBG("Found new-style reserved-ranges\n"); + + /* Each reserved range is an (address,size) pair, 2 cells each, + * totalling 4 cells per range. */ + for (i = 0; i < len / (sizeof(*prop) * 4); i++) { + u64 base, size; + + base = of_read_number(prop + (i * 4) + 0, 2); + size = of_read_number(prop + (i * 4) + 2, 2); + + if (size) { + DBG("reserving: %llx -> %llx\n", base, size); + memblock_reserve(base, size); + } + } +} + static void __init early_reserve_mem(void) { u64 base, size; @@ -574,12 +603,16 @@ static void __init early_reserve_mem(void) self_size = initial_boot_params->totalsize; memblock_reserve(self_base, self_size); + /* Look for the new "reserved-regions" property in the DT */ + early_reserve_mem_dt(); + #ifdef CONFIG_BLK_DEV_INITRD - /* then reserve the initrd, if any */ - if (initrd_start && (initrd_end > initrd_start)) + /* Then reserve the initrd, if any */ + if (initrd_start && (initrd_end > initrd_start)) { memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE), _ALIGN_UP(initrd_end, PAGE_SIZE) - _ALIGN_DOWN(initrd_start, PAGE_SIZE)); + } #endif /* CONFIG_BLK_DEV_INITRD */ #ifdef CONFIG_PPC32 @@ -591,6 +624,8 @@ static void __init early_reserve_mem(void) u32 base_32, size_32; u32 *reserve_map_32 = (u32 *)reserve_map; + DBG("Found old 32-bit reserve map\n"); + while (1) { base_32 = *(reserve_map_32++); size_32 = *(reserve_map_32++); @@ -605,6 +640,9 @@ static void __init early_reserve_mem(void) return; } #endif + DBG("Processing reserve map\n"); + + /* Handle the reserve map in the fdt blob if it exists */ while (1) { base = *(reserve_map++); size = *(reserve_map++); |