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SAMV71: More updates on the way to a clean build. Still more to do to complete that journey

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This commit is contained in:
Gregory Nutt 2015-03-06 12:13:09 -06:00
parent fdac423979
commit 6e6b9483ea
3 changed files with 51 additions and 2 deletions
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5
arch/arm/src/samv7/Make.defs
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@ -33,9 +33,10 @@
#
############################################################################
# The start-up, "head", file
# The start-up, "head", file. Only common vectors are support so there
# isn't one.
HEAD_ASRC = sam_vectors.S
HEAD_ASRC =
# Common ARM and Cortex-M3 files

37
arch/arm/src/samv7/sam_start.c
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@ -57,6 +57,43 @@
#include "sam_userspace.h"
#include "sam_start.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Memory Map ***************************************************************/
/*
* 0x0400:0000 - Beginning of the internal FLASH. Address of vectors.
* Mapped as boot memory address 0x0000:0000 at reset.
* 0x041f:ffff - End of flash region (assuming the max of 2MiB of FLASH).
* 0x2000:0000 - Start of internal SRAM and start of .data (_sdata)
* - 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. NOTE that the ARM uses a decrement before
* store stack so that the correct initial value is the end of
* the stack + 4;
* 0x2005:ffff - End of internal SRAM and end of heap (a
*/
#define IDLE_STACK ((uintptr_t)&_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
#define HEAP_BASE ((uintptr_t)&_ebss+CONFIG_IDLETHREAD_STACKSIZE)
/****************************************************************************
* Public Data
****************************************************************************/
/* g_idle_topstack: _sbss is the start of the BSS region as defined by the
* linker script. _ebss lies at the end of the BSS region. The idle task
* stack starts at the end of BSS and is of size CONFIG_IDLETHREAD_STACKSIZE.
* The IDLE thread is the thread that the system boots on and, eventually,
* becomes the IDLE, do nothing task that runs only when there is nothing
* else to run. The heap continues from there until the end of memory.
* g_idle_topstack is a read-only variable the provides this computed
* address.
*/
const uintptr_t g_idle_topstack = HEAP_BASE;
/****************************************************************************
* Private Function prototypes
****************************************************************************/

11
arch/arm/src/samv7/sam_start.h
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@ -77,6 +77,17 @@ extern "C"
#define EXTERN extern
#endif
/* g_idle_topstack: _sbss is the start of the BSS region as defined by the linker
* script. _ebss lies at the end of the BSS region. The idle task stack starts at
* the end of BSS and is of size CONFIG_IDLETHREAD_STACKSIZE. The IDLE thread is
* the thread that the system boots on and, eventually, becomes the IDLE, do
* nothing task that runs only when there is nothing else to run. The heap
* continues from there until the end of memory. g_idle_topstack is a read-only
* variable the provides this computed address.
*/
EXTERN const uintptr_t g_idle_topstack;
/************************************************************************************
* Public Function Prototypes
************************************************************************************/