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authorStephen Rothwell <sfr@canb.auug.org.au>2006-05-19 17:04:12 +1000
committerPaul Mackerras <paulus@samba.org>2006-05-24 16:08:57 +1000
commit72a14eafb243b1f31118ea55a7e8c2588b5ad468 (patch)
tree718a1f016ed660e9445d18106ba77c582416f81f
parentc4e3ea2553308ba65fea582dc9a42221ef8b49e5 (diff)
[PATCH] powerpc: make iSeries flattened device tree dynamic - part 2
This actually simplies things as we just figure out how much space we used at the end and adjust klimit then. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--arch/powerpc/platforms/iseries/dt.c62
1 files changed, 19 insertions, 43 deletions
diff --git a/arch/powerpc/platforms/iseries/dt.c b/arch/powerpc/platforms/iseries/dt.c
index 0371329f82e..2a51ec1e335 100644
--- a/arch/powerpc/platforms/iseries/dt.c
+++ b/arch/powerpc/platforms/iseries/dt.c
@@ -27,7 +27,6 @@
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/lppaca.h>
-#include <asm/page.h>
#include <asm/cputable.h>
#include <asm/abs_addr.h>
#include <asm/system.h>
@@ -51,15 +50,10 @@
extern char __dt_strings_start[];
extern char __dt_strings_end[];
-struct blob {
- unsigned char data[PAGE_SIZE * 2];
- unsigned long next;
-};
-
struct iseries_flat_dt {
struct boot_param_header header;
u64 reserve_map[2];
- struct blob *dt;
+ void *data;
};
static struct iseries_flat_dt *iseries_dt;
@@ -76,15 +70,12 @@ static struct iseries_flat_dt * __init dt_init(void)
dt->header.off_dt_strings = ALIGN(sizeof(*dt), 8);
dt->header.off_dt_struct = dt->header.off_dt_strings
+ ALIGN(str_len, 8);
- dt->dt = (struct blob *)((unsigned long)dt + dt->header.off_dt_struct);
- klimit = ALIGN((unsigned long)(dt->dt) + sizeof(struct blob), 8);
- dt->header.totalsize = klimit - (unsigned long)dt;
+ dt->data = (void *)((unsigned long)dt + dt->header.off_dt_struct);
dt->header.dt_strings_size = str_len;
/* There is no notion of hardware cpu id on iSeries */
dt->header.boot_cpuid_phys = smp_processor_id();
- dt->dt->next = (unsigned long)&dt->dt->data;
memcpy((char *)dt + dt->header.off_dt_strings, __dt_strings_start,
str_len);
@@ -98,54 +89,37 @@ static struct iseries_flat_dt * __init dt_init(void)
return dt;
}
-static void __init dt_check_blob(struct blob *b)
-{
- if (b->next >= (unsigned long)&b->next) {
- DBG("Ran out of space in flat device tree blob!\n");
- BUG();
- }
-}
-
static void __init dt_push_u32(struct iseries_flat_dt *dt, u32 value)
{
- *((u32*)dt->dt->next) = value;
- dt->dt->next += sizeof(u32);
-
- dt_check_blob(dt->dt);
+ *((u32 *)dt->data) = value;
+ dt->data += sizeof(u32);
}
#ifdef notyet
static void __init dt_push_u64(struct iseries_flat_dt *dt, u64 value)
{
- *((u64*)dt->dt->next) = value;
- dt->dt->next += sizeof(u64);
-
- dt_check_blob(dt->dt);
+ *((u64 *)dt->data) = value;
+ dt->data += sizeof(u64);
}
#endif
-static unsigned long __init dt_push_bytes(struct blob *blob, char *data, int len)
+static void __init dt_push_bytes(struct iseries_flat_dt *dt, char *data,
+ int len)
{
- unsigned long start = blob->next - (unsigned long)blob->data;
-
- memcpy((char *)blob->next, data, len);
- blob->next = _ALIGN(blob->next + len, 4);
-
- dt_check_blob(blob);
-
- return start;
+ memcpy(dt->data, data, len);
+ dt->data += ALIGN(len, 4);
}
static void __init dt_start_node(struct iseries_flat_dt *dt, char *name)
{
dt_push_u32(dt, OF_DT_BEGIN_NODE);
- dt_push_bytes(dt->dt, name, strlen(name) + 1);
+ dt_push_bytes(dt, name, strlen(name) + 1);
}
#define dt_end_node(dt) dt_push_u32(dt, OF_DT_END_NODE)
static void __init dt_prop(struct iseries_flat_dt *dt, char *name,
- char *data, int len)
+ void *data, int len)
{
unsigned long offset;
@@ -160,7 +134,7 @@ static void __init dt_prop(struct iseries_flat_dt *dt, char *name,
dt_push_u32(dt, (u32)offset);
/* The actual data. */
- dt_push_bytes(dt->dt, data, len);
+ dt_push_bytes(dt, data, len);
}
static void __init dt_prop_str(struct iseries_flat_dt *dt, char *name,
@@ -171,24 +145,24 @@ static void __init dt_prop_str(struct iseries_flat_dt *dt, char *name,
static void __init dt_prop_u32(struct iseries_flat_dt *dt, char *name, u32 data)
{
- dt_prop(dt, name, (char *)&data, sizeof(u32));
+ dt_prop(dt, name, &data, sizeof(u32));
}
static void __init dt_prop_u64(struct iseries_flat_dt *dt, char *name, u64 data)
{
- dt_prop(dt, name, (char *)&data, sizeof(u64));
+ dt_prop(dt, name, &data, sizeof(u64));
}
static void __init dt_prop_u64_list(struct iseries_flat_dt *dt, char *name,
u64 *data, int n)
{
- dt_prop(dt, name, (char *)data, sizeof(u64) * n);
+ dt_prop(dt, name, data, sizeof(u64) * n);
}
static void __init dt_prop_u32_list(struct iseries_flat_dt *dt, char *name,
u32 *data, int n)
{
- dt_prop(dt, name, (char *)data, sizeof(u32) * n);
+ dt_prop(dt, name, data, sizeof(u32) * n);
}
#ifdef notyet
@@ -595,6 +569,8 @@ static void __init dt_pci_devices(struct iseries_flat_dt *dt)
static void dt_finish(struct iseries_flat_dt *dt)
{
dt_push_u32(dt, OF_DT_END);
+ dt->header.totalsize = (unsigned long)dt->data - (unsigned long)dt;
+ klimit = ALIGN((unsigned long)dt->data, 8);
}
void * __init build_flat_dt(unsigned long phys_mem_size)