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Diffstat (limited to 'uc_str912/prj_TEST_LED/vector.s')
| -rw-r--r-- | uc_str912/prj_TEST_LED/vector.s | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/uc_str912/prj_TEST_LED/vector.s b/uc_str912/prj_TEST_LED/vector.s deleted file mode 100644 index 7708f54..0000000 --- a/uc_str912/prj_TEST_LED/vector.s +++ /dev/null @@ -1,202 +0,0 @@ -/***********************************************************************************
-* Copyright 2005 Anglia Design
-* This demo code and associated components are provided as is and has no warranty,
-* implied or otherwise. You are free to use/modify any of the provided
-* code at your own risk in your applications with the expressed limitation
-* of liability (see below)
-*
-* LIMITATION OF LIABILITY: ANGLIA OR ANGLIA DESIGNS SHALL NOT BE LIABLE FOR ANY
-* LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA, INTERRUPTION OF BUSINESS, NOR FOR
-* INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER
-* THIS AGREEMENT OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-*
-* Author : Spencer Oliver
-* Web : www.anglia-designs.com
-*
-***********************************************************************************/
-
- .equ VectorAddress, 0xFFFFF030 /* VIC Vector address register address. */
- .equ VectorAddressDaisy, 0xFC000030 /* Daisy VIC Vector address register */
-
- .equ Mode_USR, 0x10
- .equ Mode_FIQ, 0x11
- .equ Mode_IRQ, 0x12
- .equ Mode_SVC, 0x13
- .equ Mode_ABT, 0x17
- .equ Mode_UND, 0x1B
- .equ Mode_SYS, 0x1F /* available on ARM Arch 4 and later */
-
- .equ I_Bit, 0x80 /* when I bit is set, IRQ is disabled */
- .equ F_Bit, 0x40 /* when F bit is set, FIQ is disabled */
-
- .text
- .arm
- .section .vectors, "ax"
-
- .global Reset_Vec
-
-/* Note: LDR PC instructions are used here, though branch (B) instructions */
-/* could also be used, unless the ROM is at an address >32MB. */
-
-/*******************************************************************************
- Exception vectors
-*******************************************************************************/
-
-Reset_Vec: LDR pc, Reset_Addr /* Reset Handler */
-Undef_Vec: LDR pc, Undefined_Addr
-SWI_Vec: LDR pc, SWI_Addr
-PAbt_Vec: LDR pc, Prefetch_Addr
-DAbt_Vec: LDR pc, Abort_Addr
- NOP /* Reserved vector */
-IRQ_Vec: LDR pc, IRQ_Addr
-FIQ_Vec: LDR pc, FIQ_Addr
-
-/*******************************************************************************
- Exception handlers address table
-*******************************************************************************/
-
-Reset_Addr: .word _start
-Undefined_Addr: .word UndefinedHandler
-SWI_Addr: .word SWIHandler
-Prefetch_Addr: .word PrefetchHandler
-Abort_Addr: .word AbortHandler
- .word 0 /* reserved */
-IRQ_Addr: .word IRQHandler
-FIQ_Addr: .word FIQHandler
-
-/*******************************************************************************
- Exception Handlers
-*******************************************************************************/
-
-/*******************************************************************************
-* Macro Name : SaveContext
-* Description : This macro used to save the context before entering
- an exception handler.
-* Input : The range of registers to store.
-* Output : none
-*******************************************************************************/
-
-.macro SaveContext reg1 reg2
- STMFD sp!,{\reg1-\reg2,lr} /* Save The workspace plus the current return */
- /* address lr_ mode into the stack */
- MRS r1, spsr /* Save the spsr_mode into r1 */
- STMFD sp!, {r1} /* Save spsr */
-.endm
-
-/*******************************************************************************
-* Macro Name : RestoreContext
-* Description : This macro used to restore the context to return from
- an exception handler and continue the program execution.
-* Input : The range of registers to restore.
-* Output : none
-*******************************************************************************/
-
-.macro RestoreContext reg1 reg2
- LDMFD sp!, {r1} /* Restore the saved spsr_mode into r1 */
- MSR spsr_cxsf, r1 /* Restore spsr_mode */
- LDMFD sp!, {\reg1-\reg2,pc}^ /* Return to the instruction following */
- /* the exception interrupt */
-.endm
-
-/*******************************************************************************
-* Function Name : IRQHandler
-* Description : This function called when IRQ exception is entered.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-IRQHandler:
- SUB lr, lr, #4 /* Update the link register */
- SaveContext r0, r12 /* Save the workspace plus the current */
- /* return address lr_irq and spsr_irq */
- LDR r0, =VectorAddress
- LDR r0, [r0] /* Read the routine address */
- LDR r1, =VectorAddressDaisy
- LDR r1, [r1]
- /* Padding between the acknowledge and re-enable of interrupts */
- /* For more details, please refer to the following URL */
- /* http://www.arm.com/support/faqip/3682.html */
- NOP
- NOP
- MSR cpsr_c, #Mode_SYS /* Switch to SYS mode and enable IRQ */
- STMFD sp!, {lr} /* Save the link register. */
- LDR lr, =ReturnAddress /* Read the return address. */
- MOV pc, r0 /* Branch to the IRQ handler. */
-ReturnAddress:
- LDMFD sp!, {lr} /* Restore the link register. */
- MSR cpsr_c, #Mode_IRQ|I_Bit|F_Bit /* Switch to IRQ mode and disable IRQ */
- LDR r0, =VectorAddress /* Write to the VectorAddress to clear the */
- STR r0, [r0] /* respective interrupt in the internal interrupt */
- LDR r1, =VectorAddressDaisy /* Write to the VectorAddressDaisy to clear the */
- STR r1, [r1] /* respective interrupt in the internal interrupt */
- RestoreContext r0, r12 /* Restore the context and return to the program execution. */
-
-/*******************************************************************************
-* Function Name : SWIHandler
-* Description : This function called when SWI instruction executed.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-SWIHandler:
- SaveContext r0, r12 /* r0 holds swi number */
- MOV r1, sp /* load regs */
- BL SWI_Handler
- RestoreContext r0, r12
-
-/*******************************************************************************
-* Function Name : UndefinedHandler
-* Description : This function called when undefined instruction
- exception is entered.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-UndefinedHandler:
- SaveContext r0, r12
- BL Undefined_Handler
- RestoreContext r0, r12
-
-/*******************************************************************************
-* Function Name : PrefetchAbortHandler
-* Description : This function called when Prefetch Abort
- exception is entered.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-PrefetchHandler:
- SUB lr, lr, #4 /* Update the link register. */
- SaveContext r0, r12
- BL Prefetch_Handler
- RestoreContext r0, r12
-
-/*******************************************************************************
-* Function Name : DataAbortHandler
-* Description : This function is called when Data Abort
- exception is entered.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-AbortHandler:
- SUB lr, lr, #8 /* Update the link register. */
- SaveContext r0, r12
- BL Abort_Handler
- RestoreContext r0, r12
-
-/*******************************************************************************
-* Function Name : FIQHandler
-* Description : This function is called when FIQ
- exception is entered.
-* Input : none
-* Output : none
-*******************************************************************************/
-
-FIQHandler:
- SUB lr, lr, #4 /* Update the link register. */
- SaveContext r0, r7
- BL FIQ_Handler
- RestoreContext r0, r7
-
- .end
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