RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

bsps/arm: Move device tree copy

Browse Source 
Move device tree copy operation after the mode initialization so that
bsp_fdt_copy() uses the initialization stack and not the stack provided
up by the boot loader.
This commit is contained in:
Sebastian Huber
2019-02-18 09:01:27 +01:00
parent af80b0a340
commit bdec62c4d5
1 changed files with 24 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
bsps/arm/shared/start/start.S
View File

@@ -155,16 +155,6 @@ _start:
and r7, #0xff
#endif
#ifdef BSP_START_COPY_FDT_FROM_U_BOOT
#ifdef RTEMS_SMP
cmp r7, #0
bne 1f
#endif
mov r0, r6
bl bsp_fdt_copy
1:
#endif
#ifdef RTEMS_SMP
/*
* Get current per-CPU control and store it in PL1 only Thread ID
@@ -179,11 +169,11 @@ _start:
/* Calculate interrupt stack area end for current processor */
ldr r1, =_ISR_Stack_size
#ifdef RTEMS_SMP
add r7, #1
mul r1, r1, r7
add r3, r7, #1
mul r1, r1, r3
#endif
ldr r2, =_ISR_Stack_area_begin
add r7, r1, r2
add r3, r1, r2
/* Save original CPSR value */
mrs r4, cpsr
@@ -198,8 +188,8 @@ _start:
/* Boot loader starts kernel in HYP mode, switch to SVC necessary */
ldr r1, =bsp_stack_hyp_size
mov sp, r7
sub r7, r7, r1
mov sp, r3
sub r3, r3, r1
bl bsp_start_arm_drop_hyp_mode
.L_skip_hyp_svc_switch:
@@ -210,8 +200,8 @@ _start:
mov r0, #(ARM_PSR_M_FIQ | ARM_PSR_I | ARM_PSR_F)
msr cpsr, r0
ldr r1, =bsp_stack_fiq_size
mov sp, r7
sub r7, r7, r1
mov sp, r3
sub r3, r3, r1
#ifdef BSP_START_NEEDS_REGISTER_INITIALIZATION
bl bsp_start_init_registers_banked_fiq
@@ -221,20 +211,20 @@ _start:
mov r0, #(ARM_PSR_M_ABT | ARM_PSR_I | ARM_PSR_F)
msr cpsr, r0
ldr r1, =bsp_stack_abt_size
mov sp, r7
sub r7, r7, r1
mov sp, r3
sub r3, r3, r1
/* Enter UND mode and set up the UND stack pointer */
mov r0, #(ARM_PSR_M_UND | ARM_PSR_I | ARM_PSR_F)
msr cpsr, r0
ldr r1, =bsp_stack_und_size
mov sp, r7
sub r7, r7, r1
mov sp, r3
sub r3, r3, r1
/* Enter IRQ mode and set up the IRQ stack pointer */
mov r0, #(ARM_PSR_M_IRQ | ARM_PSR_I | ARM_PSR_F)
msr cpsr, r0
mov sp, r7
mov sp, r3
/*
* Enter SVC mode and set up the SVC stack pointer, reuse IRQ stack
@@ -242,10 +232,21 @@ _start:
*/
mov r0, #(ARM_PSR_M_SVC | ARM_PSR_I | ARM_PSR_F)
msr cpsr, r0
mov sp, r7
mov sp, r3
/* Stay in SVC mode */
/* Copy device tree from boot loader */
#ifdef BSP_START_COPY_FDT_FROM_U_BOOT
#ifdef RTEMS_SMP
cmp r7, #0
bne 1f
#endif
mov r0, r6
bl bsp_fdt_copy
1:
#endif
#ifdef ARM_MULTILIB_VFP
#ifdef ARM_MULTILIB_HAS_CPACR
/* Read CPACR */