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Minor change to initial stack value

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2529 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2010-01-28 04:47:27 +00:00
parent cab1c3a330
commit 4bb5f0b3ce
1 changed files with 11 additions and 10 deletions
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21
arch/arm/src/sam3u/sam3u_vectors.S
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@ -2,7 +2,7 @@
* arch/arm/src/sam3u/sam3u_vectors.S
* arch/arm/src/chip/sam3u_vectors.S
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
@ -47,19 +47,20 @@
/* Memory Map:
*
* 0x0800:0000 - Beginning of FLASH. Address of vectors (if not using bootloader)
* Mapped to address 0x0000:0000 at boot time.
* 0x0800:3000 - Address of vectors if using bootloader
* 0x0800:0000 - Beginning of FLASH. Address of vectors. Mapped to address 0x0000:0000 at boot
* time.
* 0x0803:ffff - End of flash
* 0x2000:0000 - Start of SRAM and start of .data (_sdata)
* - End of .data (_edata) abd start of .bss (_sbss)
* - End of .data (_edata) and start of .bss (_sbss)
* - End of .bss (_ebss) and bottom of idle stack
* - _ebss + CONFIG_IDLETHREAD_STACKSIZE = end of idle stack, start of heap
* 0x2000:ffff - End of SRAM and end of heap
* - _ebss + CONFIG_IDLETHREAD_STACKSIZE = end of idle stack, start of heap. NOTE
* that the ARM uses a decrement before store stack so that the correct initial
* value is the end of the stack + 4;
* 0x2000:bfff - End of SRAM and end of heap
*/
#define IDLE_STACK (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
#define HEAP_BASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
#define IDLE_STACK (_ebss+CONFIG_IDLETHREAD_STACKSIZE)
#define HEAP_BASE (_ebss+CONFIG_IDLETHREAD_STACKSIZE)
/* The Cortex-M3 return from interrupt is unusual. We provide the following special
* address to the BX instruction. The particular value also forces a return to
@ -333,7 +334,7 @@ up_interruptstack_base:
.globl g_heapbase
.type g_heapbase, object
g_heapbase:
.long _ebss+CONFIG_IDLETHREAD_STACKSIZE
.word HEAP_BASE
.size g_heapbase, .-g_heapbase
.end