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of/flattree: merge early_init_dt_scan_memory() common code 

Merge common code between PowerPC and Microblaze architectures.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Grant Likely 2010-02-01 21:34:14 -07:00
parent 71a157e8ed
commit 51975db0b7
4 changed files with 74 additions and 101 deletions
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49
arch/microblaze/kernel/prom.c
View File

@ -45,62 +45,15 @@
/* export that to outside world */
struct device_node *of_chosen;
#define early_init_dt_scan_drconf_memory(node) 0
void __init early_init_dt_scan_chosen_arch(unsigned long node)
{
/* No Microblaze specific code here */
}
static int __init early_init_dt_scan_memory(unsigned long node,
const char *uname, int depth, void *data)
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
__be32 *reg, *endp;
unsigned long l;
/* Look for the ibm,dynamic-reconfiguration-memory node */
/* if (depth == 1 &&
strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0)
return early_init_dt_scan_drconf_memory(node);
*/
/* We are scanning "memory" nodes only */
if (type == NULL) {
/*
* The longtrail doesn't have a device_type on the
* /memory node, so look for the node called /memory@0.
*/
if (depth != 1 || strcmp(uname, "memory@0") != 0)
return 0;
} else if (strcmp(type, "memory") != 0)
return 0;
reg = (__be32 *)of_get_flat_dt_prop(node, "linux,usable-memory", &l);
if (reg == NULL)
reg = (__be32 *)of_get_flat_dt_prop(node, "reg", &l);
if (reg == NULL)
return 0;
endp = reg + (l / sizeof(__be32));
pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, &reg);
size = dt_mem_next_cell(dt_root_size_cells, &reg);
if (size == 0)
continue;
pr_debug(" - %llx , %llx\n", (unsigned long long)base,
(unsigned long long)size);
lmb_add(base, size);
}
return 0;
}
#ifdef CONFIG_EARLY_PRINTK
/* MS this is Microblaze specifig function */

55
arch/powerpc/kernel/prom.c
View File

@ -483,66 +483,33 @@ static int __init early_init_dt_scan_drconf_memory(unsigned long node)
#define early_init_dt_scan_drconf_memory(node) 0
#endif /* CONFIG_PPC_PSERIES */
static int __init early_init_dt_scan_memory(unsigned long node,
const char *uname, int depth, void *data)
static int __init early_init_dt_scan_memory_ppc(unsigned long node,
const char *uname,
int depth, void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
__be32 *reg, *endp;
unsigned long l;
/* Look for the ibm,dynamic-reconfiguration-memory node */
if (depth == 1 &&
strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0)
return early_init_dt_scan_drconf_memory(node);
/* We are scanning "memory" nodes only */
if (type == NULL) {
/*
* The longtrail doesn't have a device_type on the
* /memory node, so look for the node called /memory@0.
*/
if (depth != 1 || strcmp(uname, "memory@0") != 0)
return 0;
} else if (strcmp(type, "memory") != 0)
return 0;
return early_init_dt_scan_memory(node, uname, depth, data);
}
reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
if (reg == NULL)
reg = of_get_flat_dt_prop(node, "reg", &l);
if (reg == NULL)
return 0;
endp = reg + (l / sizeof(__be32));
DBG("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, &reg);
size = dt_mem_next_cell(dt_root_size_cells, &reg);
if (size == 0)
continue;
DBG(" - %llx , %llx\n", (unsigned long long)base,
(unsigned long long)size);
#ifdef CONFIG_PPC64
void __init early_init_dt_add_memory_arch(u64 base, u64 size)
{
#if defined(CONFIG_PPC64)
if (iommu_is_off) {
if (base >= 0x80000000ul)
continue;
return;
if ((base + size) > 0x80000000ul)
size = 0x80000000ul - base;
}
#endif
lmb_add(base, size);
memstart_addr = min((u64)memstart_addr, base);
}
return 0;
}
static void __init early_reserve_mem(void)
{
u64 base, size;
@ -706,7 +673,7 @@ void __init early_init_devtree(void *params)
/* Scan memory nodes and rebuild LMBs */
lmb_init();
of_scan_flat_dt(early_init_dt_scan_root, NULL);
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
/* Save command line for /proc/cmdline and then parse parameters */
strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);

50
drivers/of/fdt.c
View File

@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_fdt.h>
#ifdef CONFIG_PPC
#include <asm/machdep.h>
#endif /* CONFIG_PPC */
@ -443,6 +444,55 @@ u64 __init dt_mem_next_cell(int s, u32 **cellp)
return of_read_number(p, s);
}
/**
* early_init_dt_scan_memory - Look for an parse memory nodes
*/
int __init early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data)
{
char *type = of_get_flat_dt_prop(node, "device_type", NULL);
__be32 *reg, *endp;
unsigned long l;
/* We are scanning "memory" nodes only */
if (type == NULL) {
/*
* The longtrail doesn't have a device_type on the
* /memory node, so look for the node called /memory@0.
*/
if (depth != 1 || strcmp(uname, "memory@0") != 0)
return 0;
} else if (strcmp(type, "memory") != 0)
return 0;
reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
if (reg == NULL)
reg = of_get_flat_dt_prop(node, "reg", &l);
if (reg == NULL)
return 0;
endp = reg + (l / sizeof(__be32));
pr_debug("memory scan node %s, reg size %ld, data: %x %x %x %x,\n",
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, &reg);
size = dt_mem_next_cell(dt_root_size_cells, &reg);
if (size == 0)
continue;
pr_debug(" - %llx , %llx\n", (unsigned long long)base,
(unsigned long long)size);
early_init_dt_add_memory_arch(base, size);
}
return 0;
}
int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data)
{

3
include/linux/of_fdt.h
View File

@ -75,6 +75,9 @@ extern void early_init_dt_scan_chosen_arch(unsigned long node);
extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data);
extern void early_init_dt_check_for_initrd(unsigned long node);
extern int early_init_dt_scan_memory(unsigned long node, const char *uname,
int depth, void *data);
extern void early_init_dt_add_memory_arch(u64 base, u64 size);
extern u64 dt_mem_next_cell(int s, u32 **cellp);
/* Early flat tree scan hooks */