mirror of https://github.com/acidanthera/audk.git
61 lines
2.0 KiB
ArmAsm
61 lines
2.0 KiB
ArmAsm
#
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# Copyright (c) 2011-2012, ARM Limited. All rights reserved.
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#
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#include <AsmMacroIoLib.h>
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#include <Library/PcdLib.h>
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#include <AutoGen.h>
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#include <Drivers/PL35xSmc.h>
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.text
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#Maintain 8 byte alignment
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.align 3
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GCC_ASM_EXPORT(PL35xSmcInitialize)
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GCC_ASM_EXPORT(PL35xSmcSetRefresh)
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// IN r1 Smc Base Address
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// IN r2 Smc Configuration Start Address
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// IN r3 Smc Configuration End Address
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// NOTE: This code is been called before any stack has been setup. It means some registers
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// could be overwritten (case of 'r0')
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ASM_PFX(PL35xSmcInitialize):
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// While (SmcConfigurationStart < SmcConfigurationEnd)
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cmp r2, r3
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blxge lr
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// Write to set_cycle register(holding register for NOR 1 cycle register or NAND cycle register)
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ldr r0, [r2, #0x4]
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str r0, [r1, #PL350_SMC_SET_CYCLES_OFFSET]
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// Write to set_opmode register(holding register for NOR 1 opomode register or NAND opmode register)
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ldr r0, [r2, #0x8]
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str r0, [r1, #PL350_SMC_SET_OPMODE_OFFSET]
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// Write to direct_cmd register so that the NOR 1 registers(set-cycles and opmode) are updated with holding registers
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ldr r0, =PL350_SMC_DIRECT_CMD_ADDR_CMD_UPDATE
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ldr r4, [r2, #0x0]
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orr r0, r0, r4
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str r0, [r1, #PL350_SMC_DIRECT_CMD_OFFSET]
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add r2, #0xC
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b ASM_PFX(PL35xSmcInitialize)
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// IN r1 Smc Base Address
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// IN r2 Smc Refresh Period 0
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// IN r3 Smc Refresh Period 1
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ASM_PFX(PL35xSmcSetRefresh):
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str r2, [r1, #PL350_SMC_REFRESH_0_OFFSET]
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str r3, [r1, #PL350_SMC_REFRESH_1_OFFSET]
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blx lr
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