1 // 2 // Copyright (c) 2011-2012, ARM Limited. All rights reserved. 3 // 4 // This program and the accompanying materials 5 // are licensed and made available under the terms and conditions of the BSD License 6 // which accompanies this distribution. The full text of the license may be found at 7 // http://opensource.org/licenses/bsd-license.php 8 // 9 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 // 12 // 13 14 #include <AsmMacroIoLib.h> 15 #include <Library/PcdLib.h> 16 #include <Drivers/PL35xSmc.h> 17 #include <AutoGen.h> 18 19 INCLUDE AsmMacroIoLib.inc 20 21 EXPORT PL35xSmcInitialize 22 EXPORT PL35xSmcSetRefresh 23 24 PRESERVE8 25 AREA ModuleInitializeSMC, CODE, READONLY 26 27 // IN r1 Smc Base Address 28 // IN r2 Smc Configuration Start Address 29 // IN r3 Smc Configuration End Address 30 // NOTE: This code is been called before any stack has been setup. It means some registers 31 // could be overwritten (case of 'r0') 32 PL35xSmcInitialize 33 // While (SmcConfigurationStart < SmcConfigurationEnd) 34 cmp r2, r3 35 blxge lr 36 37 // Write to set_cycle register(holding register for NOR 1 cycle register or NAND cycle register) 38 ldr r0, [r2, #0x4] 39 str r0, [r1, #PL350_SMC_SET_CYCLES_OFFSET] 40 41 // Write to set_opmode register(holding register for NOR 1 opomode register or NAND opmode register) 42 ldr r0, [r2, #0x8] 43 str r0, [r1, #PL350_SMC_SET_OPMODE_OFFSET] 44 45 // Write to direct_cmd register so that the NOR 1 registers(set-cycles and opmode) are updated with holding registers 46 ldr r0, =PL350_SMC_DIRECT_CMD_ADDR_CMD_UPDATE 47 ldr r4, [r2, #0x0] 48 orr r0, r0, r4 49 str r0, [r1, #PL350_SMC_DIRECT_CMD_OFFSET] 50 51 add r2, #0xC 52 b PL35xSmcInitialize 53 54 // IN r1 Smc Base Address 55 // IN r2 Smc Refresh Period 0 56 // IN r3 Smc Refresh Period 1 57 PL35xSmcSetRefresh 58 str r2, [r1, #PL350_SMC_REFRESH_0_OFFSET] 59 str r3, [r1, #PL350_SMC_REFRESH_1_OFFSET] 60 blx lr 61 62 END 63
