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提交 493adffc 编写于 作者: B Benjamin Herrenschmidt
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powerpc: Make prom_init.c endian safe 

Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
上级 d10bd84f
隐藏空白更改
内联 并排
Showing with 147 addition and 106 deletion
arch/powerpc/kernel/prom_init.c
浏览文件 @ 493adffc
......@@ -107,10 +107,10 @@ int of_workarounds;
typedef u32 prom_arg_t;
struct prom_args {
u32 service;
u32 nargs;
u32 nret;
prom_arg_t args[10];
__be32 service;
__be32 nargs;
__be32 nret;
__be32 args[10];
};
struct prom_t {
......@@ -123,11 +123,11 @@ struct prom_t {
};
struct mem_map_entry {
u64 base;
u64 size;
__be64 base;
__be64 size;
};
typedef u32 cell_t;
typedef __be32 cell_t;
extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7, unsigned long r8,
......@@ -219,13 +219,13 @@ static int __init call_prom(const char *service, int nargs, int nret, ...)
struct prom_args args;
va_list list;
args.service = ADDR(service);
args.nargs = nargs;
args.nret = nret;
args.service = cpu_to_be32(ADDR(service));
args.nargs = cpu_to_be32(nargs);
args.nret = cpu_to_be32(nret);
va_start(list, nret);
for (i = 0; i < nargs; i++)
args.args[i] = va_arg(list, prom_arg_t);
args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
va_end(list);
for (i = 0; i < nret; i++)
......@@ -234,7 +234,7 @@ static int __init call_prom(const char *service, int nargs, int nret, ...)
if (enter_prom(&args, prom_entry) < 0)
return PROM_ERROR;
return (nret > 0) ? args.args[nargs] : 0;
return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
}
static int __init call_prom_ret(const char *service, int nargs, int nret,
......@@ -244,13 +244,13 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
struct prom_args args;
va_list list;
args.service = ADDR(service);
args.nargs = nargs;
args.nret = nret;
args.service = cpu_to_be32(ADDR(service));
args.nargs = cpu_to_be32(nargs);
args.nret = cpu_to_be32(nret);
va_start(list, rets);
for (i = 0; i < nargs; i++)
args.args[i] = va_arg(list, prom_arg_t);
args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
va_end(list);
for (i = 0; i < nret; i++)
......@@ -261,9 +261,9 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
if (rets != NULL)
for (i = 1; i < nret; ++i)
rets[i-1] = args.args[nargs+i];
rets[i-1] = be32_to_cpu(args.args[nargs+i]);
return (nret > 0) ? args.args[nargs] : 0;
return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
}
......@@ -527,7 +527,7 @@ static int __init prom_setprop(phandle node, const char *nodename,
#define islower(c) ('a' <= (c) && (c) <= 'z')
#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
unsigned long prom_strtoul(const char *cp, const char **endp)
static unsigned long prom_strtoul(const char *cp, const char **endp)
{
unsigned long result = 0, base = 10, value;
......@@ -552,7 +552,7 @@ unsigned long prom_strtoul(const char *cp, const char **endp)
return result;
}
unsigned long prom_memparse(const char *ptr, const char **retptr)
static unsigned long prom_memparse(const char *ptr, const char **retptr)
{
unsigned long ret = prom_strtoul(ptr, retptr);
int shift = 0;
......@@ -724,7 +724,8 @@ unsigned char ibm_architecture_vec[] = {
};
/* Old method - ELF header with PT_NOTE sections */
/* Old method - ELF header with PT_NOTE sections only works on BE */
#ifdef __BIG_ENDIAN__
static struct fake_elf {
Elf32_Ehdr elfhdr;
Elf32_Phdr phdr[2];
......@@ -810,6 +811,7 @@ static struct fake_elf {
}
}
};
#endif /* __BIG_ENDIAN__ */
static int __init prom_count_smt_threads(void)
{
......@@ -852,9 +854,9 @@ static int __init prom_count_smt_threads(void)
static void __init prom_send_capabilities(void)
{
ihandle elfloader, root;
ihandle root;
prom_arg_t ret;
u32 *cores;
__be32 *cores;
root = call_prom("open", 1, 1, ADDR("/"));
if (root != 0) {
......@@ -864,15 +866,15 @@ static void __init prom_send_capabilities(void)
* (we assume this is the same for all cores) and use it to
* divide NR_CPUS.
*/
cores = (u32 *)&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
if (*cores != NR_CPUS) {
cores = (__be32 *)&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
if (be32_to_cpup(cores) != NR_CPUS) {
prom_printf("WARNING ! "
"ibm_architecture_vec structure inconsistent: %lu!\n",
*cores);
be32_to_cpup(cores));
} else {
*cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
*cores = cpu_to_be32(DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()));
prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
*cores, NR_CPUS);
be32_to_cpup(cores), NR_CPUS);
}
/* try calling the ibm,client-architecture-support method */
......@@ -893,17 +895,24 @@ static void __init prom_send_capabilities(void)
prom_printf(" not implemented\n");
}
/* no ibm,client-architecture-support call, try the old way */
elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
if (elfloader == 0) {
prom_printf("couldn't open /packages/elf-loader\n");
return;
#ifdef __BIG_ENDIAN__
{
ihandle elfloader;
/* no ibm,client-architecture-support call, try the old way */
elfloader = call_prom("open", 1, 1,
ADDR("/packages/elf-loader"));
if (elfloader == 0) {
prom_printf("couldn't open /packages/elf-loader\n");
return;
}
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
elfloader, ADDR(&fake_elf));
call_prom("close", 1, 0, elfloader);
}
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
elfloader, ADDR(&fake_elf));
call_prom("close", 1, 0, elfloader);
#endif /* __BIG_ENDIAN__ */
}
#endif
#endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
/*
* Memory allocation strategy... our layout is normally:
......@@ -1050,11 +1059,11 @@ static unsigned long __init prom_next_cell(int s, cell_t **cellp)
p++;
s--;
}
r = *p++;
r = be32_to_cpu(*p++);
#ifdef CONFIG_PPC64
if (s > 1) {
r <<= 32;
r |= *(p++);
r |= be32_to_cpu(*(p++));
}
#endif
*cellp = p;
......@@ -1087,8 +1096,8 @@ static void __init reserve_mem(u64 base, u64 size)
if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
prom_panic("Memory reserve map exhausted !\n");
mem_reserve_map[cnt].base = base;
mem_reserve_map[cnt].size = size;
mem_reserve_map[cnt].base = cpu_to_be64(base);
mem_reserve_map[cnt].size = cpu_to_be64(size);
mem_reserve_cnt = cnt + 1;
}
......@@ -1102,6 +1111,7 @@ static void __init prom_init_mem(void)
char *path, type[64];
unsigned int plen;
cell_t *p, *endp;
__be32 val;
u32 rac, rsc;
/*
......@@ -1109,12 +1119,14 @@ static void __init prom_init_mem(void)
* 1) top of RMO (first node)
* 2) top of memory
*/
rac = 2;
prom_getprop(prom.root, "#address-cells", &rac, sizeof(rac));
rsc = 1;
prom_getprop(prom.root, "#size-cells", &rsc, sizeof(rsc));
prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
val = cpu_to_be32(2);
prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
rac = be32_to_cpu(val);
val = cpu_to_be32(1);
prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
rsc = be32_to_cpu(val);
prom_debug("root_addr_cells: %x\n", rac);
prom_debug("root_size_cells: %x\n", rsc);
prom_debug("scanning memory:\n");
path = prom_scratch;
......@@ -1222,25 +1234,23 @@ static void __init prom_init_mem(void)
static void __init prom_close_stdin(void)
{
ihandle val;
__be32 val;
ihandle stdin;
if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0)
call_prom("close", 1, 0, val);
if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
stdin = be32_to_cpu(val);
call_prom("close", 1, 0, stdin);
}
}
#ifdef CONFIG_PPC_POWERNV
static u64 __initdata prom_opal_size;
static u64 __initdata prom_opal_align;
static int __initdata prom_rtas_start_cpu;
static u64 __initdata prom_rtas_data;
static u64 __initdata prom_rtas_entry;
#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
static u64 __initdata prom_opal_base;
static u64 __initdata prom_opal_entry;
#endif
#ifdef __BIG_ENDIAN__
/* XXX Don't change this structure without updating opal-takeover.S */
static struct opal_secondary_data {
s64 ack; /* 0 */
......@@ -1248,6 +1258,12 @@ static struct opal_secondary_data {
struct opal_takeover_args args; /* 16 */
} opal_secondary_data;
static u64 __initdata prom_opal_align;
static u64 __initdata prom_opal_size;
static int __initdata prom_rtas_start_cpu;
static u64 __initdata prom_rtas_data;
static u64 __initdata prom_rtas_entry;
extern char opal_secondary_entry;
static void __init prom_query_opal(void)
......@@ -1265,6 +1281,7 @@ static void __init prom_query_opal(void)
}
prom_printf("Querying for OPAL presence... ");
rc = opal_query_takeover(&prom_opal_size,
&prom_opal_align);
prom_debug("(rc = %ld) ", rc);
......@@ -1425,6 +1442,7 @@ static void __init prom_opal_takeover(void)
for (;;)
opal_do_takeover(args);
}
#endif /* __BIG_ENDIAN__ */
/*
* Allocate room for and instantiate OPAL
......@@ -1435,6 +1453,7 @@ static void __init prom_instantiate_opal(void)
ihandle opal_inst;
u64 base, entry;
u64 size = 0, align = 0x10000;
__be64 val64;
u32 rets[2];
prom_debug("prom_instantiate_opal: start...\n");
......@@ -1444,11 +1463,14 @@ static void __init prom_instantiate_opal(void)
if (!PHANDLE_VALID(opal_node))
return;
prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
val64 = 0;
prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
size = be64_to_cpu(val64);
if (size == 0)
return;
prom_getprop(opal_node, "opal-runtime-alignment", &align,
sizeof(align));
val64 = 0;
prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
align = be64_to_cpu(val64);
base = alloc_down(size, align, 0);
if (base == 0) {
......@@ -1505,6 +1527,7 @@ static void __init prom_instantiate_rtas(void)
phandle rtas_node;
ihandle rtas_inst;
u32 base, entry = 0;
__be32 val;
u32 size = 0;
prom_debug("prom_instantiate_rtas: start...\n");
......@@ -1514,7 +1537,9 @@ static void __init prom_instantiate_rtas(void)
if (!PHANDLE_VALID(rtas_node))
return;
prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
val = 0;
prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
size = be32_to_cpu(val);
if (size == 0)
return;
......@@ -1541,12 +1566,14 @@ static void __init prom_instantiate_rtas(void)
reserve_mem(base, size);
val = cpu_to_be32(base);
prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
&base, sizeof(base));
&val, sizeof(val));
val = cpu_to_be32(entry);
prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
&entry, sizeof(entry));
&val, sizeof(val));
#ifdef CONFIG_PPC_POWERNV
#if defined(CONFIG_PPC_POWERNV) && defined(__BIG_ENDIAN__)
/* PowerVN takeover hack */
prom_rtas_data = base;
prom_rtas_entry = entry;
......@@ -1620,6 +1647,7 @@ static void __init prom_instantiate_sml(void)
/*
* Allocate room for and initialize TCE tables
*/
#ifdef __BIG_ENDIAN__
static void __init prom_initialize_tce_table(void)
{
phandle node;
......@@ -1748,7 +1776,8 @@ static void __init prom_initialize_tce_table(void)
/* Flag the first invalid entry */
prom_debug("ending prom_initialize_tce_table\n");
}
#endif
#endif /* __BIG_ENDIAN__ */
#endif /* CONFIG_PPC64 */
/*
* With CHRP SMP we need to use the OF to start the other processors.
......@@ -1777,7 +1806,6 @@ static void __init prom_initialize_tce_table(void)
static void __init prom_hold_cpus(void)
{
unsigned long i;
unsigned int reg;
phandle node;
char type[64];
unsigned long *spinloop
......@@ -1803,6 +1831,9 @@ static void __init prom_hold_cpus(void)
/* look for cpus */
for (node = 0; prom_next_node(&node); ) {
unsigned int cpu_no;
__be32 reg;
type[0] = 0;
prom_getprop(node, "device_type", type, sizeof(type));
if (strcmp(type, "cpu") != 0)
......@@ -1813,10 +1844,11 @@ static void __init prom_hold_cpus(void)
if (strcmp(type, "okay") != 0)
continue;
reg = -1;
reg = cpu_to_be32(-1); /* make sparse happy */
prom_getprop(node, "reg", &reg, sizeof(reg));
cpu_no = be32_to_cpu(reg);
prom_debug("cpu hw idx = %lu\n", reg);
prom_debug("cpu hw idx = %lu\n", cpu_no);
/* Init the acknowledge var which will be reset by
* the secondary cpu when it awakens from its OF
......@@ -1824,24 +1856,24 @@ static void __init prom_hold_cpus(void)
*/
*acknowledge = (unsigned long)-1;
if (reg != prom.cpu) {
if (cpu_no != prom.cpu) {
/* Primary Thread of non-boot cpu or any thread */
prom_printf("starting cpu hw idx %lu... ", reg);
prom_printf("starting cpu hw idx %lu... ", cpu_no);
call_prom("start-cpu", 3, 0, node,
secondary_hold, reg);
secondary_hold, cpu_no);
for (i = 0; (i < 100000000) &&
(*acknowledge == ((unsigned long)-1)); i++ )
mb();
if (*acknowledge == reg)
if (*acknowledge == cpu_no)
prom_printf("done\n");
else
prom_printf("failed: %x\n", *acknowledge);
}
#ifdef CONFIG_SMP
else
prom_printf("boot cpu hw idx %lu\n", reg);
prom_printf("boot cpu hw idx %lu\n", cpu_no);
#endif /* CONFIG_SMP */
}
......@@ -1895,6 +1927,7 @@ static void __init prom_find_mmu(void)
prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
prom_getprop(prom.chosen, "mmu", &prom.mmumap,
sizeof(prom.mmumap));
prom.mmumap = be32_to_cpu(prom.mmumap);
if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
}
......@@ -1906,17 +1939,19 @@ static void __init prom_init_stdout(void)
{
char *path = of_stdout_device;
char type[16];
u32 val;
phandle stdout_node;
__be32 val;
if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
prom_panic("cannot find stdout");
prom.stdout = val;
prom.stdout = be32_to_cpu(val);
/* Get the full OF pathname of the stdout device */
memset(path, 0, 256);
call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
val = call_prom("instance-to-package", 1, 1, prom.stdout);
stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
val = cpu_to_be32(stdout_node);
prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
&val, sizeof(val));
prom_printf("OF stdout device is: %s\n", of_stdout_device);
......@@ -1925,9 +1960,9 @@ static void __init prom_init_stdout(void)
/* If it's a display, note it */
memset(type, 0, sizeof(type));
prom_getprop(val, "device_type", type, sizeof(type));
prom_getprop(stdout_node, "device_type", type, sizeof(type));
if (strcmp(type, "display") == 0)
prom_setprop(val, path, "linux,boot-display", NULL, 0);
prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
}
static int __init prom_find_machine_type(void)
......@@ -2133,8 +2168,10 @@ static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
return ret;
}
#define dt_push_token(token, mem_start, mem_end) \
do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
#define dt_push_token(token, mem_start, mem_end) do { \
void *room = make_room(mem_start, mem_end, 4, 4); \
*(__be32 *)room = cpu_to_be32(token); \
} while(0)
static unsigned long __init dt_find_string(char *str)
{
......@@ -2307,7 +2344,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
dt_push_token(4, mem_start, mem_end);
dt_push_token(soff, mem_start, mem_end);
valp = make_room(mem_start, mem_end, 4, 4);
*(u32 *)valp = node;
*(__be32 *)valp = cpu_to_be32(node);
}
}
......@@ -2380,16 +2417,16 @@ static void __init flatten_device_tree(void)
dt_struct_end = PAGE_ALIGN(mem_start);
/* Finish header */
hdr->boot_cpuid_phys = prom.cpu;
hdr->magic = OF_DT_HEADER;
hdr->totalsize = dt_struct_end - dt_header_start;
hdr->off_dt_struct = dt_struct_start - dt_header_start;
hdr->off_dt_strings = dt_string_start - dt_header_start;
hdr->dt_strings_size = dt_string_end - dt_string_start;
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - dt_header_start;
hdr->version = OF_DT_VERSION;
hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
hdr->magic = cpu_to_be32(OF_DT_HEADER);
hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
hdr->version = cpu_to_be32(OF_DT_VERSION);
/* Version 16 is not backward compatible */
hdr->last_comp_version = 0x10;
hdr->last_comp_version = cpu_to_be32(0x10);
/* Copy the reserve map in */
memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
......@@ -2400,8 +2437,8 @@ static void __init flatten_device_tree(void)
prom_printf("reserved memory map:\n");
for (i = 0; i < mem_reserve_cnt; i++)
prom_printf(" %x - %x\n",
mem_reserve_map[i].base,
mem_reserve_map[i].size);
be64_to_cpu(mem_reserve_map[i].base),
be64_to_cpu(mem_reserve_map[i].size));
}
#endif
/* Bump mem_reserve_cnt to cause further reservations to fail
......@@ -2413,7 +2450,6 @@ static void __init flatten_device_tree(void)
dt_string_start, dt_string_end);
prom_printf("Device tree struct 0x%x -> 0x%x\n",
dt_struct_start, dt_struct_end);
}
#ifdef CONFIG_PPC_MAPLE
......@@ -2746,18 +2782,19 @@ static void __init fixup_device_tree(void)
static void __init prom_find_boot_cpu(void)
{
u32 getprop_rval;
__be32 rval;
ihandle prom_cpu;
phandle cpu_pkg;
prom.cpu = 0;
if (prom_getprop(prom.chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
rval = 0;
if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
return;
prom_cpu = be32_to_cpu(rval);
cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
prom.cpu = getprop_rval;
prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
prom.cpu = be32_to_cpu(rval);
prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
}
......@@ -2766,15 +2803,15 @@ static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
{
#ifdef CONFIG_BLK_DEV_INITRD
if (r3 && r4 && r4 != 0xdeadbeef) {
unsigned long val;
__be64 val;
prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
prom_initrd_end = prom_initrd_start + r4;
val = prom_initrd_start;
val = cpu_to_be64(prom_initrd_start);
prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
&val, sizeof(val));
val = prom_initrd_end;
val = cpu_to_be64(prom_initrd_end);
prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
&val, sizeof(val));
......@@ -2931,7 +2968,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/
prom_check_displays();
#ifdef CONFIG_PPC64
#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
/*
* Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
* that uses the allocator, we need to make sure we get the top of memory
......@@ -2950,6 +2987,7 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
prom_instantiate_rtas();
#ifdef CONFIG_PPC_POWERNV
#ifdef __BIG_ENDIAN__
/* Detect HAL and try instanciating it & doing takeover */
if (of_platform == PLATFORM_PSERIES_LPAR) {
prom_query_opal();
......@@ -2957,9 +2995,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
prom_opal_hold_cpus();
prom_opal_takeover();
}
} else if (of_platform == PLATFORM_OPAL)
} else
#endif /* __BIG_ENDIAN__ */
if (of_platform == PLATFORM_OPAL)
prom_instantiate_opal();
#endif
#endif /* CONFIG_PPC_POWERNV */
#ifdef CONFIG_PPC64
/* instantiate sml */
......@@ -2978,10 +3018,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
/*
* Fill in some infos for use by the kernel later on
*/
if (prom_memory_limit)
if (prom_memory_limit) {
__be64 val = cpu_to_be64(prom_memory_limit);
prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
&prom_memory_limit,
sizeof(prom_memory_limit));
&val, sizeof(val));
}
#ifdef CONFIG_PPC64
if (prom_iommu_off)
prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
......
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