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;*****************************************************************************
;
; epi_workaround_ccs.s - EPI memory access functions.
;
; Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved.
; Software License Agreement
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
;
; Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
;
; Redistributions in binary form must reproduce the above copyright
; notice, this list of conditions and the following disclaimer in the
; documentation and/or other materials provided with the
; distribution.
;
; Neither the name of Texas Instruments Incorporated nor the names of
; its contributors may be used to endorse or promote products derived
; from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;
; This is part of revision 2.1.0.12573 of the Tiva Peripheral Driver Library.
;
;*****************************************************************************
;*****************************************************************************
;
; void EPIWorkaroundWordWrite(uint32_t *pui32Addr, uint32_t ui32Value)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundWordWrite"
.global EPIWorkaroundWordWrite
EPIWorkaroundWordWrite:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Store the word in EPI memory.
;
str r1, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [sp]
;
; Return to the caller.
;
bx lr
.align 4
;*****************************************************************************
;
; uint32_t EPIWorkaroundWordRead(uint32_t *pui32Addr)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundWordRead"
.global EPIWorkaroundWordRead
EPIWorkaroundWordRead:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Read the word from EPI memory.
;
ldr r0, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [r13]
;
; Return to the caller.
;
bx lr
.align 4
;*****************************************************************************
;
; void EPIWorkaroundHWordWrite(uint16_t *pui16Addr, uint16_t ui16Value)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundHWordWrite"
.global EPIWorkaroundHWordWrite
EPIWorkaroundHWordWrite:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Store the word in EPI memory.
;
strh r1, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [sp]
;
; Return to the caller.
;
bx lr
.align 4
;*****************************************************************************
;
; uint16_t EPIWorkaroundHWordRead(uint16_t *pui16Addr)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundHWordRead"
.global EPIWorkaroundHWordRead
EPIWorkaroundHWordRead:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Read the half word from EPI memory.
;
ldrh r0, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [r13]
;
; Return to the caller.
;
bx lr
.align 4
;*****************************************************************************
;
; void EPIWorkaroundByteWrite(uint8_t *pui8Addr, uint8_t ui8Value)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundByteWrite"
.global EPIWorkaroundByteWrite
EPIWorkaroundByteWrite:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Store the byte in EPI memory.
;
strb r1, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [sp]
;
; Return to the caller.
;
bx lr
.align 4
;*****************************************************************************
;
; uint8_t EPIWorkaroundByteRead(uint8_t *pui8Addr)
;
;*****************************************************************************
.sect ".text:EPIWorkaroundByteRead"
.global EPIWorkaroundByteRead
EPIWorkaroundByteRead:
;
; Include a no-op to ensure that we don't have a flash data access
; immediately before the EPI access.
;
nop
;
; Read the byte from EPI memory.
;
ldrb r0, [r0]
;
; Make a dummy read from the stack to ensure that we don't have a flash
; data access immediately after the EPI access.
;
ldr r1, [r13]
;
; Return to the caller.
;
bx lr
.align 4
.end
|
