ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Support mbed_start_application for Cortex-M0+

pull/9791/head
Sarah Marsh 2019-02-21 11:13:50 +00:00
parent f61dee1626
commit 7201cab3c4
2 changed files with 23 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
platform/mbed_application.c
View File

@ -89,10 +89,16 @@ void mbed_start_application(uintptr_t address)
static void powerdown_nvic()
{
int isr_groups_32;
int i;
#if defined(__CORTEX_M0PLUS)
NVIC->ICER[0] = 0xFFFFFFFF;
NVIC->ICPR[0] = 0xFFFFFFFF;
for (i = 0; i < 8; i++) {
NVIC->IP[i] = 0x00000000;
}
#else
int j;
int isr_groups_32;
#if defined(__CORTEX_M23)
// M23 doesn't support ICTR and supports up to 240 external interrupts.
isr_groups_32 = 8;
@ -110,6 +116,7 @@ static void powerdown_nvic()
#endif
}
}
#endif
}
static void powerdown_scb(uint32_t vtor)
@ -122,21 +129,21 @@ static void powerdown_scb(uint32_t vtor)
SCB->AIRCR = 0x05FA | 0x0000;
SCB->SCR = 0x00000000;
// SCB->CCR - Implementation defined value
#if defined(__CORTEX_M23)
for (i = 0; i < 2; i++) {
SCB->SHPR[i] = 0x00;
}
int num_pri_reg; // Number of priority registers
#if defined(__CORTEX_M0PLUS) || defined(__CORTEX_M23)
num_pri_reg = 2;
#else
for (i = 0; i < 12; i++) {
#if defined(__CORTEX_M7)
num_pri_reg = 12;
#endif
for (i = 0; i < num_pri_reg; i++) {
#if defined(__CORTEX_M7) || defined(__CORTEX_M23)
SCB->SHPR[i] = 0x00;
#else
SCB->SHP[i] = 0x00;
#endif
}
#endif
SCB->SHCSR = 0x00000000;
#if defined(__CORTEX_M23)
#if defined(__CORTEX_M23) || defined(__CORTEX_M0PLUS)
#else
SCB->CFSR = 0xFFFFFFFF;
SCB->HFSR = SCB_HFSR_DEBUGEVT_Msk | SCB_HFSR_FORCED_Msk | SCB_HFSR_VECTTBL_Msk;
@ -170,7 +177,11 @@ __asm static void start_new_application(void *sp, void *pc)
void start_new_application(void *sp, void *pc)
{
__asm volatile(
#if defined(__CORTEX_M0PLUS)
"mov r2, #0 \n" // No MOVW instruction on Cortex-M0+
#else
"movw r2, #0 \n" // Fail to compile "mov r2, #0" with ARMC6. Replace with MOVW.
#endif
// We needn't "movt r2, #0" immediately following because MOVW
// will zero-extend the 16-bit immediate.
"msr control, r2 \n" // Switch to main stack

2
platform/mbed_application.h
View File

@ -20,7 +20,7 @@
#include<stdint.h>
#if defined(__CORTEX_M3) || defined(__CORTEX_M4) || defined(__CORTEX_M7)\
#if defined(__CORTEX_M0PLUS) || defined(__CORTEX_M3) || defined(__CORTEX_M4) || defined(__CORTEX_M7)\
|| defined(__CORTEX_M23) || defined(__CORTEX_A9)
#define MBED_APPLICATION_SUPPORT 1
#else