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[M2351] Support initializing multiple .data/.bss sections with GCC_ARM

pull/10959/head
ccli8 2019-01-16 13:18:35 +08:00 committed by Chun-Chieh Li
parent db11eef0bc
commit 76a029e88d
2 changed files with 61 additions and 20 deletions
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17
targets/TARGET_NUVOTON/TARGET_M2351/device/TOOLCHAIN_GCC_ARM/M2351.ld
View File

@ -150,6 +150,23 @@ SECTIONS
. = ALIGN(8);
} > VECTORS
.copy.table : ALIGN(4)
{
__copy_table_start__ = .;
LONG (LOADADDR(.data))
LONG (ADDR(.data))
LONG (SIZEOF(.data))
__copy_table_end__ = .;
} > FLASH
.zero.table : ALIGN(4)
{
__zero_table_start__ = .;
LONG (ADDR(.bss))
LONG (SIZEOF(.bss))
__zero_table_end__ = .;
} > FLASH
.text :
{
*(.text*)

64
targets/TARGET_NUVOTON/TARGET_M2351/device/startup_M2351.c
View File

@ -55,11 +55,10 @@ extern void __main(void);
void __iar_program_start(void);
#elif defined(__GNUC__)
extern uint32_t __StackTop;
extern uint32_t __etext;
extern uint32_t __data_start__;
extern uint32_t __data_end__;
extern uint32_t __bss_start__;
extern uint32_t __bss_end__;
extern uint32_t __copy_table_start__;
extern uint32_t __copy_table_end__;
extern uint32_t __zero_table_start__;
extern uint32_t __zero_table_end__;
#if defined(TOOLCHAIN_GCC_ARM)
extern void _start(void);
@ -350,26 +349,51 @@ void Reset_Handler(void)
__iar_program_start();
#elif defined(__GNUC__)
uint32_t *src_ind = (uint32_t *) &__etext;
uint32_t *dst_ind = (uint32_t *) &__data_start__;
uint32_t *dst_end = (uint32_t *) &__data_end__;
/* Move (multiple) .data section(s) from ROM to RAM */
{
/* Struct of copy table entry which must match linker script */
typedef struct copy_table_entry_ {
uint32_t src; // Address to copy from
uint32_t dst; // Address to copy to
uint32_t size; // Copy size in bytes
} copy_table_entry;
/* Move .data section from ROM to RAM */
if (src_ind != dst_ind) {
for (; dst_ind < dst_end;) {
*dst_ind ++ = *src_ind ++;
copy_table_entry *copy_table_ind = (copy_table_entry *) &__copy_table_start__;
copy_table_entry *copy_table_end = (copy_table_entry *) &__copy_table_end__;
for (; copy_table_ind != copy_table_end; copy_table_ind ++) {
uint32_t *src_ind = (uint32_t *) copy_table_ind->src;
uint32_t *src_end = (uint32_t *) (copy_table_ind->src + copy_table_ind->size);
uint32_t *dst_ind = (uint32_t *) copy_table_ind->dst;
if (src_ind != dst_ind) {
for (; src_ind < src_end;) {
*dst_ind ++ = *src_ind ++;
}
}
}
}
/* Initialize .bss section to zero */
dst_ind = (uint32_t *) &__bss_start__;
dst_end = (uint32_t *) &__bss_end__;
if (dst_ind != dst_end) {
for (; dst_ind < dst_end;) {
*dst_ind ++ = 0;
/* Initialize (multiple) .bss sections to zero */
{
/* Struct of zero table entry which must match linker script */
typedef struct zero_table_entry_ {
uint32_t start; // Address to start zero'ing
uint32_t size; // Zero size in bytes
} zero_table_entry;
zero_table_entry *zero_table_ind = (zero_table_entry *) &__zero_table_start__;
zero_table_entry *zero_table_end = (zero_table_entry *) &__zero_table_end__;
for (; zero_table_ind != zero_table_end; zero_table_ind ++) {
uint32_t *dst_ind = (uint32_t *) zero_table_ind->start;
uint32_t *dst_end = (uint32_t *) (zero_table_ind->start + zero_table_ind->size);
for (; dst_ind < dst_end; ) {
*dst_ind ++ = 0;
}
}
}
_start();
#endif