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comparison packages/hal/arm/arch/current/src/vectors.S @ 46:797268ecc331 ecos-sw-1999-10-19

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Merge from eCos master repository on 1999-10-19-18:55:31-BST
author jlarmour
date Tue, 19 Oct 1999 19:19:52 +0000
parents a3cc6665b684
children a0774359f013
comparison
equal deleted inserted replaced
45:91d213c0da48 46:797268ecc331
114 PTR(FIQ) // 0x3c 114 PTR(FIQ) // 0x3c
115 PTR(start) // This is copied to 0x28 for bootup // 0x40 115 PTR(start) // This is copied to 0x28 for bootup // 0x40
116 // location 0x40 is used for storing DRAM size if known 116 // location 0x40 is used for storing DRAM size if known
117 // for some platforms. 117 // for some platforms.
118 118
119 // Other vectors
120 .balign 16 // Should be at 0x50
121 .balign 32
122
119 .text 123 .text
120 // Startup code which will get the machine into supervisor mode 124 // Startup code which will get the machine into supervisor mode
121 .global reset_vector 125 .global reset_vector
122 .type reset_vector,function 126 .type reset_vector,function
123 reset_vector: 127 reset_vector:
128 PLATFORM_SETUP1 // Early stage platform initialization
129 // which can set DRAM size at 0x40
130 // see <cyg/hal/hal_platform_setup.h>
124 131
125 #if defined(CYG_HAL_STARTUP_RAM) && \ 132 #if defined(CYG_HAL_STARTUP_RAM) && \
126 !defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) 133 !defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
127 mrs r7,cpsr // move back to IRQ mode 134 mrs r7,cpsr // move back to IRQ mode
128 and r7,r7,#CPSR_MODE_BITS 135 and r7,r7,#CPSR_MODE_BITS
129 cmp r7,#CPSR_SUPERVISOR_MODE 136 cmp r7,#CPSR_SUPERVISOR_MODE
130 beq start 137 beq start
131 #endif 138 #endif
132 139
133 PLATFORM_SETUP1 // Early stage platform initialization
134 // which can set DRAM size at 0x40
135 // see <cyg/hal/hal_platform_setup.h>
136 // We cannot access any LED registers until after PLATFORM_SETUP1 140 // We cannot access any LED registers until after PLATFORM_SETUP1
137 LED 7 141 LED 7
138 142
139 mov r0,#0 // move vectors 143 mov r0,#0 // move vectors
140 // We cannot perform a store until after PLATFORM_SETUP1 144 // We cannot perform a store until after PLATFORM_SETUP1
141 str r0, [r0,#0x40] // DRAM size to zero => unknown 145 str r0, [r0,#0x40] // DRAM size to zero => unknown
142 ldr r1,.__exception_handlers 146
147 ldr r1,=__exception_handlers
143 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS 148 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
144 // Wait with this if stubs are included (see further down). 149 // Wait with this if stubs are included (see further down).
145 ldr r2,[r1,#0x04] // undefined instruction 150 ldr r2,[r1,#0x04] // undefined instruction
146 str r2,[r0,#0x04] 151 str r2,[r0,#0x04]
147 ldr r2,[r1,#0x24] 152 ldr r2,[r1,#0x24]
148 str r2,[r0,#0x24] 153 str r2,[r0,#0x24]
149 #endif 154 #endif
150 ldr r2,[r1,#0x08] // software interrupt 155 ldr r2,[r1,#0x08] // software interrupt
151 str r2,[r0,#0x08] 156 str r2,[r0,#0x08]
157
158
152 #if defined(CYG_HAL_STARTUP_RAM) 159 #if defined(CYG_HAL_STARTUP_RAM)
153 // Ugly hack to get into supervisor mode 160 // Ugly hack to get into supervisor mode
154 ldr r2,[r1,#0x40] 161 ldr r2,[r1,#0x40]
155 str r2,[r0,#0x28] 162 str r2,[r0,#0x28]
156 163
293 init_done: 300 init_done:
294 .long 0xDEADB00B 301 .long 0xDEADB00B
295 302
296 // 303 //
297 // Exception handlers 304 // Exception handlers
298 // Assmumption: get here from a Supervisor context [mode] 305 // Assumption: get here from a Supervisor context [mode]
299 // 306 //
300 .code 32 307 .code 32
301 undefined_instruction: 308 undefined_instruction:
302 ldr sp,.__undef_exception_stack // get good stack 309 ldr sp,.__undef_exception_stack // get good stack
303 sub lr,lr,#4 // PC at time of interrupt 310 sub lr,lr,#4 // PC at time of interrupt