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-rw-r--r--README13
-rw-r--r--common/board_f.c12
-rw-r--r--common/board_r.c4
-rw-r--r--common/dlmalloc.c35
-rw-r--r--include/asm-generic/global_data.h5
-rw-r--r--lib/asm-offsets.c3
6 files changed, 72 insertions, 0 deletions
diff --git a/README b/README
index 4ac7399..11e9d31 100644
--- a/README
+++ b/README
@@ -3736,6 +3736,19 @@ Configuration Settings:
- CONFIG_SYS_MALLOC_LEN:
Size of DRAM reserved for malloc() use.
+- CONFIG_SYS_MALLOC_F_LEN
+ Size of the malloc() pool for use before relocation. If
+ this is defined, then a very simple malloc() implementation
+ will become available before relocation. The address is just
+ below the global data, and the stack is moved down to make
+ space.
+
+ This feature allocates regions with increasing addresses
+ within the region. calloc() is supported, but realloc()
+ is not available. free() is supported but does nothing.
+ The memory will be freed (or in fact just forgotton) when
+ U-Boot relocates itself.
+
- CONFIG_SYS_BOOTM_LEN:
Normally compressed uImages are limited to an
uncompressed size of 8 MBytes. If this is not enough,
diff --git a/common/board_f.c b/common/board_f.c
index bdab38e..6b2e277 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -767,6 +767,17 @@ static int mark_bootstage(void)
return 0;
}
+static int initf_malloc(void)
+{
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ assert(gd->malloc_base); /* Set up by crt0.S */
+ gd->malloc_limit = gd->malloc_base + CONFIG_SYS_MALLOC_F_LEN;
+ gd->malloc_ptr = 0;
+#endif
+
+ return 0;
+}
+
static init_fnc_t init_sequence_f[] = {
#ifdef CONFIG_SANDBOX
setup_ram_buf,
@@ -824,6 +835,7 @@ static init_fnc_t init_sequence_f[] = {
sdram_adjust_866,
init_timebase,
#endif
+ initf_malloc,
init_baud_rate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
console_init_f, /* stage 1 init of console */
diff --git a/common/board_r.c b/common/board_r.c
index 4479acb..2298ba5 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -259,6 +259,10 @@ static int initr_malloc(void)
{
ulong malloc_start;
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ debug("Pre-reloc malloc() used %#lx bytes (%ld KB)\n", gd->malloc_ptr,
+ gd->malloc_ptr / 1024);
+#endif
/* The malloc area is immediately below the monitor copy in DRAM */
malloc_start = gd->relocaddr - TOTAL_MALLOC_LEN;
mem_malloc_init((ulong)map_sysmem(malloc_start, TOTAL_MALLOC_LEN),
diff --git a/common/dlmalloc.c b/common/dlmalloc.c
index d1cd561..26ba8fd 100644
--- a/common/dlmalloc.c
+++ b/common/dlmalloc.c
@@ -930,6 +930,8 @@ struct mallinfo mALLINFo();
#endif /* 0 */ /* Moved to malloc.h */
#include <malloc.h>
+#include <asm/io.h>
+
#ifdef DEBUG
#if __STD_C
static void malloc_update_mallinfo (void);
@@ -2174,6 +2176,20 @@ Void_t* mALLOc(bytes) size_t bytes;
INTERNAL_SIZE_T nb;
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ if (!(gd->flags & GD_FLG_RELOC)) {
+ ulong new_ptr;
+ void *ptr;
+
+ new_ptr = gd->malloc_ptr + bytes;
+ if (new_ptr > gd->malloc_limit)
+ panic("Out of pre-reloc memory");
+ ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
+ gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
+ return ptr;
+ }
+#endif
+
/* check if mem_malloc_init() was run */
if ((mem_malloc_start == 0) && (mem_malloc_end == 0)) {
/* not initialized yet */
@@ -2437,6 +2453,12 @@ void fREe(mem) Void_t* mem;
mchunkptr fwd; /* misc temp for linking */
int islr; /* track whether merging with last_remainder */
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ /* free() is a no-op - all the memory will be freed on relocation */
+ if (!(gd->flags & GD_FLG_RELOC))
+ return;
+#endif
+
if (mem == NULL) /* free(0) has no effect */
return;
@@ -2588,6 +2610,13 @@ Void_t* rEALLOc(oldmem, bytes) Void_t* oldmem; size_t bytes;
/* realloc of null is supposed to be same as malloc */
if (oldmem == NULL) return mALLOc(bytes);
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ if (!(gd->flags & GD_FLG_RELOC)) {
+ /* This is harder to support and should not be needed */
+ panic("pre-reloc realloc() is not supported");
+ }
+#endif
+
newp = oldp = mem2chunk(oldmem);
newsize = oldsize = chunksize(oldp);
@@ -2933,6 +2962,12 @@ Void_t* cALLOc(n, elem_size) size_t n; size_t elem_size;
return NULL;
else
{
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ if (!(gd->flags & GD_FLG_RELOC)) {
+ MALLOC_ZERO(mem, sz);
+ return mem;
+ }
+#endif
p = mem2chunk(mem);
/* Two optional cases in which clearing not necessary */
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 2850ed8..f6a2a20 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -85,6 +85,11 @@ typedef struct global_data {
#endif
unsigned long timebase_h;
unsigned long timebase_l;
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ unsigned long malloc_base; /* base address of early malloc() */
+ unsigned long malloc_limit; /* limit address */
+ unsigned long malloc_ptr; /* current address */
+#endif
struct arch_global_data arch; /* architecture-specific data */
} gd_t;
#endif
diff --git a/lib/asm-offsets.c b/lib/asm-offsets.c
index 6ea7b03..129bc3e 100644
--- a/lib/asm-offsets.c
+++ b/lib/asm-offsets.c
@@ -28,6 +28,9 @@ int main(void)
DEFINE(GD_SIZE, sizeof(struct global_data));
DEFINE(GD_BD, offsetof(struct global_data, bd));
+#ifdef CONFIG_SYS_MALLOC_F_LEN
+ DEFINE(GD_MALLOC_BASE, offsetof(struct global_data, malloc_base));
+#endif
#if defined(CONFIG_ARM)