diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/mti-sead3/sead3-dtshim.c | 71 | ||||
| -rw-r--r-- | arch/mips/mti-sead3/sead3-setup.c | 66 |
2 files changed, 71 insertions, 66 deletions
diff --git a/arch/mips/mti-sead3/sead3-dtshim.c b/arch/mips/mti-sead3/sead3-dtshim.c index 6e32ceb..d6b0708 100644 --- a/arch/mips/mti-sead3/sead3-dtshim.c +++ b/arch/mips/mti-sead3/sead3-dtshim.c @@ -22,6 +22,73 @@ static unsigned char fdt_buf[16 << 10] __initdata; +static int append_memory(void *fdt) +{ + unsigned long phys_memsize, memsize; + __be32 mem_array[2]; + int err, mem_off; + char *var; + + /* find memory size from the bootloader environment */ + var = fw_getenv("memsize"); + if (var) { + err = kstrtoul(var, 0, &phys_memsize); + if (err) { + pr_err("Failed to read memsize env variable '%s'\n", + var); + return -EINVAL; + } + } else { + pr_warn("The bootloader didn't provide memsize: defaulting to 32MB\n"); + phys_memsize = 32 << 20; + } + + /* default to using all available RAM */ + memsize = phys_memsize; + + /* allow the user to override the usable memory */ + var = strstr(arcs_cmdline, "memsize="); + if (var) + memsize = memparse(var + strlen("memsize="), NULL); + + /* if the user says there's more RAM than we thought, believe them */ + phys_memsize = max_t(unsigned long, phys_memsize, memsize); + + /* find or add a memory node */ + mem_off = fdt_path_offset(fdt, "/memory"); + if (mem_off == -FDT_ERR_NOTFOUND) + mem_off = fdt_add_subnode(fdt, 0, "memory"); + if (mem_off < 0) { + pr_err("Unable to find or add memory DT node: %d\n", mem_off); + return mem_off; + } + + err = fdt_setprop_string(fdt, mem_off, "device_type", "memory"); + if (err) { + pr_err("Unable to set memory node device_type: %d\n", err); + return err; + } + + mem_array[0] = 0; + mem_array[1] = cpu_to_be32(phys_memsize); + err = fdt_setprop(fdt, mem_off, "reg", mem_array, sizeof(mem_array)); + if (err) { + pr_err("Unable to set memory regs property: %d\n", err); + return err; + } + + mem_array[0] = 0; + mem_array[1] = cpu_to_be32(memsize); + err = fdt_setprop(fdt, mem_off, "linux,usable-memory", + mem_array, sizeof(mem_array)); + if (err) { + pr_err("Unable to set linux,usable-memory property: %d\n", err); + return err; + } + + return 0; +} + static int remove_gic(void *fdt) { const unsigned int cpu_ehci_int = 2; @@ -205,6 +272,10 @@ void __init *sead3_dt_shim(void *fdt) if (err) panic("Unable to open FDT: %d", err); + err = append_memory(fdt_buf); + if (err) + panic("Unable to patch FDT: %d", err); + err = remove_gic(fdt_buf); if (err) panic("Unable to patch FDT: %d", err); diff --git a/arch/mips/mti-sead3/sead3-setup.c b/arch/mips/mti-sead3/sead3-setup.c index c4fc0c6..c915e54 100644 --- a/arch/mips/mti-sead3/sead3-setup.c +++ b/arch/mips/mti-sead3/sead3-setup.c @@ -11,7 +11,6 @@ #include <linux/of_fdt.h> #include <asm/prom.h> -#include <asm/fw/fw.h> #include <asm/mach-sead3/sead3-dtshim.h> #include <asm/mips-boards/generic.h> @@ -21,68 +20,6 @@ const char *get_system_type(void) return "MIPS SEAD3"; } -static uint32_t get_memsize_from_cmdline(void) -{ - int memsize = 0; - char *p = arcs_cmdline; - char *s = "memsize="; - - p = strstr(p, s); - if (p) { - p += strlen(s); - memsize = memparse(p, NULL); - } - - return memsize; -} - -static uint32_t get_memsize_from_env(void) -{ - int memsize = 0; - char *p; - - p = fw_getenv("memsize"); - if (p) - memsize = memparse(p, NULL); - - return memsize; -} - -static uint32_t get_memsize(void) -{ - uint32_t memsize; - - memsize = get_memsize_from_cmdline(); - if (memsize) - return memsize; - - return get_memsize_from_env(); -} - -static void __init parse_memsize_param(void) -{ - int offset; - const uint64_t *prop_value; - int prop_len; - uint32_t memsize = get_memsize(); - - if (!memsize) - return; - - offset = fdt_path_offset(__dtb_start, "/memory"); - if (offset > 0) { - uint64_t new_value; - /* - * reg contains 2 32-bits BE values, offset and size. We just - * want to replace the size value without affecting the offset - */ - prop_value = fdt_getprop(__dtb_start, offset, "reg", &prop_len); - new_value = be64_to_cpu(*prop_value); - new_value = (new_value & ~0xffffffffllu) | memsize; - fdt_setprop_inplace_u64(__dtb_start, offset, "reg", new_value); - } -} - void __init *plat_get_fdt(void) { return (void *)__dtb_start; @@ -92,9 +29,6 @@ void __init plat_mem_setup(void) { void *fdt = plat_get_fdt(); - /* allow command line/bootloader env to override memory size in DT */ - parse_memsize_param(); - fdt = sead3_dt_shim(fdt); __dt_setup_arch(fdt); } |
