From: Stephen Rothwell Date: Fri, 19 May 2006 07:04:12 +0000 (+1000) Subject: [PATCH] powerpc: make iSeries flattened device tree dynamic - part 2 X-Git-Tag: v2.6.18-rc1~1081^2~225^2~84 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72a14eafb243b1f31118ea55a7e8c2588b5ad468;p=linux-2.6 [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 Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/iseries/dt.c b/arch/powerpc/platforms/iseries/dt.c index 0371329f82..2a51ec1e33 100644 --- a/arch/powerpc/platforms/iseries/dt.c +++ b/arch/powerpc/platforms/iseries/dt.c @@ -27,7 +27,6 @@ #include #include #include -#include #include #include #include @@ -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)