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comparison packages/hal/arm/arch/current/src/context.S @ 38:e7ba79f6d3a8 ecos-sw-1999-09-23

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Merge from eCos master repository on 1999-09-23-20:10:25-BST
author jlarmour
date Thu, 23 Sep 1999 19:52:27 +0000
parents 5f5102441818
children c38311975d4f
comparison
equal deleted inserted replaced
37:0b25345c9c69 38:e7ba79f6d3a8
65 // Note: this is a little wasteful since r0..r3 don't need to be saved. 65 // Note: this is a little wasteful since r0..r3 don't need to be saved.
66 // They are saved here though so that the information can match the HAL_SavedRegisters 66 // They are saved here though so that the information can match the HAL_SavedRegisters
67 67
68 FUNC_START(hal_thread_switch_context) 68 FUNC_START(hal_thread_switch_context)
69 mov ip,sp // saved stack pointer 69 mov ip,sp // saved stack pointer
70 sub sp,sp,#ARMREG_SIZE // make space for saved registers 70 stmfd sp!,{fp,ip,lr,pc} // filler
71 stmea sp,{r0-r10,fp,ip,lr,pc} 71 stmfd sp!,{r0-r10,fp,ip,lr,pc}
72 mrs r2,cpsr 72 mrs r2,cpsr
73 str r2,[sp,#armreg_cpsr] 73 str r2,[sp,#armreg_cpsr]
74 str sp,[r1] // return new stack pointer 74 str sp,[r1] // return new stack pointer
75 75
76 # Now load the destination thread by dropping through 76 # Now load the destination thread by dropping through
88 mrs r0,cpsr // disable IRQ's 88 mrs r0,cpsr // disable IRQ's
89 orr r0,r0,#CPSR_IRQ_DISABLE|CPSR_FIQ_DISABLE 89 orr r0,r0,#CPSR_IRQ_DISABLE|CPSR_FIQ_DISABLE
90 msr cpsr,r0 90 msr cpsr,r0
91 ldr r0,[fp,#armreg_cpsr] 91 ldr r0,[fp,#armreg_cpsr]
92 msr spsr,r0 92 msr spsr,r0
93 ldmfd fp,{r0-r10,fp,sp,lr} // also restores saved PSR 93 ldmfd fp,{r0-r10,fp,sp,lr}
94 movs pc,lr 94 movs pc,lr // also restores saved PSR
95 95
96 // ------------------------------------------------------------------------------ 96 // ------------------------------------------------------------------------------
97 // HAL longjmp, setjmp implementations 97 // HAL longjmp, setjmp implementations
98 // hal_setjmp saves only to callee save registers 4-14 98 // hal_setjmp saves only to callee save registers 4-14
99 // and lr into buffer supplied in r0[arg0] 99 // and lr into buffer supplied in r0[arg0]