| /* |
| * Copyright (C) 2011 Andes Technology Corporation |
| * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> |
| * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| .text |
| |
| #include <common.h> |
| #include <config.h> |
| |
| #include <asm/macro.h> |
| #include <generated/asm-offsets.h> |
| |
| /* |
| * parameters for the SDRAM controller |
| */ |
| #define SDMC_TP1_A (CONFIG_FTSDMC021_BASE + FTSDMC021_TP1) |
| #define SDMC_TP2_A (CONFIG_FTSDMC021_BASE + FTSDMC021_TP2) |
| #define SDMC_CR1_A (CONFIG_FTSDMC021_BASE + FTSDMC021_CR1) |
| #define SDMC_CR2_A (CONFIG_FTSDMC021_BASE + FTSDMC021_CR2) |
| #define SDMC_B0_BSR_A (CONFIG_FTSDMC021_BASE + FTSDMC021_BANK0_BSR) |
| #define SDMC_B1_BSR_A (CONFIG_FTSDMC021_BASE + FTSDMC021_BANK1_BSR) |
| |
| #define SDMC_TP1_D CONFIG_SYS_FTSDMC021_TP1 |
| #define SDMC_TP2_D CONFIG_SYS_FTSDMC021_TP2 |
| #define SDMC_CR1_D CONFIG_SYS_FTSDMC021_CR1 |
| #define SDMC_CR2_D CONFIG_SYS_FTSDMC021_CR2 |
| |
| #define SDMC_B0_BSR_D CONFIG_SYS_FTSDMC021_BANK0_BSR |
| #define SDMC_B1_BSR_D CONFIG_SYS_FTSDMC021_BANK1_BSR |
| |
| |
| /* |
| * for Orca and Emerald |
| */ |
| #define BOARD_ID_REG 0x104 |
| #define BOARD_ID_FAMILY_MASK 0xfff000 |
| #define BOARD_ID_FAMILY_V5 0x556000 |
| #define BOARD_ID_FAMILY_K7 0x74b000 |
| |
| /* |
| * parameters for the static memory controller |
| */ |
| #define SMC_BANK0_CR_A (CONFIG_FTSMC020_BASE + FTSMC020_BANK0_CR) |
| #define SMC_BANK0_TPR_A (CONFIG_FTSMC020_BASE + FTSMC020_BANK0_TPR) |
| |
| #define SMC_BANK0_CR_D FTSMC020_BANK0_LOWLV_CONFIG |
| #define SMC_BANK0_TPR_D FTSMC020_BANK0_LOWLV_TIMING |
| |
| /* |
| * parameters for the ahbc controller |
| */ |
| #define AHBC_CR_A (CONFIG_FTAHBC020S_BASE + FTAHBC020S_CR) |
| #define AHBC_BSR6_A (CONFIG_FTAHBC020S_BASE + FTAHBC020S_SLAVE_BSR_6) |
| |
| /* |
| * for Orca and Emerald |
| */ |
| #define AHBC_BSR4_A (CONFIG_FTAHBC020S_BASE + FTAHBC020S_SLAVE_BSR_4) |
| #define AHBC_BSR6_D CONFIG_SYS_FTAHBC020S_SLAVE_BSR_6 |
| |
| /* |
| * parameters for the pmu controoler |
| */ |
| #define PMU_PDLLCR0_A (CONFIG_FTPMU010_BASE + FTPMU010_PDLLCR0) |
| |
| /* |
| * numeric 7 segment display |
| */ |
| .macro led, num |
| write32 CONFIG_DEBUG_LED, \num |
| .endm |
| |
| /* |
| * Waiting for SDRAM to set up |
| */ |
| .macro wait_sdram |
| li $r0, CONFIG_FTSDMC021_BASE |
| 1: |
| lwi $r1, [$r0+FTSDMC021_CR2] |
| bnez $r1, 1b |
| .endm |
| |
| #ifndef CONFIG_SKIP_LOWLEVEL_INIT |
| .globl lowlevel_init |
| lowlevel_init: |
| move $r10, $lp |
| |
| led 0x0 |
| jal mem_init |
| |
| led 0x10 |
| jal remap |
| |
| #if (defined(NDS32_EXT_FPU_DP) || defined(NDS32_EXT_FPU_SP)) |
| led 0x1f |
| jal enable_fpu |
| #endif |
| |
| led 0x20 |
| ret $r10 |
| |
| mem_init: |
| move $r11, $lp |
| |
| /* |
| * mem_init: |
| * There are 2 bank connected to FTSMC020 on AG101 |
| * BANK0: FLASH/ROM (SW5, J16), BANK1: OnBoard SDRAM. |
| * we need to set onboard SDRAM before remap and relocation. |
| */ |
| led 0x01 |
| |
| /* |
| * for Orca and Emerald |
| * disable write protection and reset bank size |
| */ |
| li $r0, SMC_BANK0_CR_A |
| lwi $r1, [$r0+#0x00] |
| ori $r1, $r1, 0x8f0 |
| xori $r1, $r1, 0x8f0 |
| /* |
| * check board |
| */ |
| li $r3, CONFIG_FTPMU010_BASE + BOARD_ID_REG |
| lwi $r3, [$r3] |
| li $r4, BOARD_ID_FAMILY_MASK |
| and $r3, $r3, $r4 |
| li $r4, BOARD_ID_FAMILY_K7 |
| xor $r4, $r3, $r4 |
| beqz $r4, use_flash_16bit_boot |
| /* |
| * 32-bit mode |
| */ |
| use_flash_32bit_boot: |
| ori $r1, $r1, 0x50 |
| li $r2, 0x00151151 |
| j sdram_b0_cr |
| /* |
| * 16-bit mode |
| */ |
| use_flash_16bit_boot: |
| ori $r1, $r1, 0x60 |
| li $r2, 0x00153153 |
| /* |
| * SRAM bank0 config |
| */ |
| sdram_b0_cr: |
| swi $r1, [$r0+#0x00] |
| swi $r2, [$r0+#0x04] |
| |
| /* |
| * config AHB Controller |
| */ |
| led 0x02 |
| |
| /* |
| * config PMU controller |
| */ |
| /* ftpmu010_dlldis_disable, must do it in lowleve_init */ |
| led 0x03 |
| setbf32 PMU_PDLLCR0_A, FTPMU010_PDLLCR0_DLLDIS ! 0x00010000 |
| |
| /* |
| * config SDRAM controller |
| */ |
| led 0x04 |
| write32 SDMC_TP1_A, SDMC_TP1_D ! 0x00011312 |
| led 0x05 |
| write32 SDMC_TP2_A, SDMC_TP2_D ! 0x00480180 |
| led 0x06 |
| write32 SDMC_CR1_A, SDMC_CR1_D ! 0x00002326 |
| |
| led 0x07 |
| write32 SDMC_CR2_A, FTSDMC021_CR2_IPREC ! 0x00000010 |
| wait_sdram |
| |
| led 0x08 |
| write32 SDMC_CR2_A, FTSDMC021_CR2_ISMR ! 0x00000004 |
| wait_sdram |
| |
| led 0x09 |
| write32 SDMC_CR2_A, FTSDMC021_CR2_IREF ! 0x00000008 |
| wait_sdram |
| |
| led 0x0a |
| move $lp, $r11 |
| ret |
| |
| remap: |
| move $r11, $lp |
| #ifdef __NDS32_N1213_43U1H__ /* NDS32 V0 ISA - AG101 Only */ |
| bal 2f |
| relo_base: |
| move $r0, $lp |
| #else |
| relo_base: |
| mfusr $r0, $pc |
| #endif /* __NDS32_N1213_43U1H__ */ |
| |
| /* |
| * Remapping |
| */ |
| led 0x1a |
| write32 SDMC_B0_BSR_A, SDMC_B0_BSR_D ! 0x00001100 |
| write32 SDMC_B1_BSR_A, SDMC_B1_BSR_D ! 0x00001140 |
| |
| /* clear empty BSR registers */ |
| led 0x1b |
| li $r4, CONFIG_FTSDMC021_BASE |
| li $r5, 0x0 |
| swi $r5, [$r4 + FTSDMC021_BANK2_BSR] |
| swi $r5, [$r4 + FTSDMC021_BANK3_BSR] |
| |
| #ifdef CONFIG_MEM_REMAP |
| /* |
| * Copy ROM code to SDRAM base for memory remap layout. |
| * This is not the real relocation, the real relocation is the function |
| * relocate_code() is start.S which supports the systems is memory |
| * remapped or not. |
| */ |
| /* |
| * Doing memory remap is essential for preparing some non-OS or RTOS |
| * applications. |
| * |
| * This is also a must on ADP-AG101 board. |
| * The reason is because the ROM/FLASH circuit on PCB board. |
| * AG101-A0 board has 2 jumpers MA17 and SW5 to configure which |
| * ROM/FLASH is used to boot. |
| * |
| * When SW5 = "0101", MA17 = LO, the ROM is connected to BANK0, |
| * and the FLASH is connected to BANK1. |
| * When SW5 = "1010", MA17 = HI, the ROM is disabled (still at BANK0), |
| * and the FLASH is connected to BANK0. |
| * It will occur problem when doing flash probing if the flash is at |
| * BANK0 (0x00000000) while memory remapping was skipped. |
| * |
| * Other board like ADP-AG101P may not enable this since there is only |
| * a FLASH connected to bank0. |
| */ |
| led 0x11 |
| /* |
| * for Orca and Emerald |
| * read sdram base address automatically |
| */ |
| li $r5, AHBC_BSR6_A |
| lwi $r8, [$r5] |
| li $r4, 0xfff00000 |
| and $r4, $r4, $r8 |
| |
| |
| li $r5, 0x0 |
| la $r1, relo_base /* get $pc or $lp */ |
| sub $r2, $r0, $r1 |
| sethi $r6, hi20(_end) |
| ori $r6, $r6, lo12(_end) |
| add $r6, $r6, $r2 |
| 1: |
| lwi.p $r7, [$r5], #4 |
| swi.p $r7, [$r4], #4 |
| blt $r5, $r6, 1b |
| |
| /* set remap bit */ |
| /* |
| * MEM remap bit is operational |
| * - use it to map writeable memory at 0x00000000, in place of flash |
| * - before remap: flash/rom 0x00000000, sdram: 0x10000000-0x4fffffff |
| * - after remap: flash/rom 0x80000000, sdram: 0x00000000 |
| */ |
| led 0x1c |
| write32 SDMC_B0_BSR_A, 0x00001000 |
| write32 SDMC_B1_BSR_A, 0x00001040 |
| setbf15 AHBC_CR_A, FTAHBC020S_CR_REMAP ! 0x1 |
| |
| /* |
| * for Orca and Emerald |
| * extend sdram size from 256MB to 2GB |
| */ |
| li $r5, AHBC_BSR6_A |
| lwi $r6, [$r5] |
| li $r4, 0xfff0ffff |
| and $r6 ,$r4 , $r6 |
| li $r4, 0x000b0000 |
| or $r6, $r4, $r6 |
| swi $r6, [$r5] |
| |
| /* |
| * for Orca and Emerald |
| * extend rom base from 256MB to 2GB |
| */ |
| li $r4, AHBC_BSR4_A |
| lwi $r5, [$r4] |
| li $r6, 0xffffff |
| and $r5, $r5, $r6 |
| li $r6, 0x80000000 |
| or $r5, $r5, $r6 |
| swi $r5, [$r4] |
| #endif /* #ifdef CONFIG_MEM_REMAP */ |
| move $lp, $r11 |
| 2: |
| ret |
| |
| /* |
| * enable_fpu: |
| * Some of Andes CPU version support FPU coprocessor, if so, |
| * and toolchain support FPU instruction set, we should enable it. |
| */ |
| #if (defined(NDS32_EXT_FPU_DP) || defined(NDS32_EXT_FPU_SP)) |
| enable_fpu: |
| mfsr $r0, $CPU_VER /* enable FPU if it exists */ |
| srli $r0, $r0, 3 |
| andi $r0, $r0, 1 |
| beqz $r0, 1f /* skip if no COP */ |
| mfsr $r0, $FUCOP_EXIST |
| srli $r0, $r0, 31 |
| beqz $r0, 1f /* skip if no FPU */ |
| mfsr $r0, $FUCOP_CTL |
| ori $r0, $r0, 1 |
| mtsr $r0, $FUCOP_CTL |
| 1: |
| ret |
| #endif |
| |
| .globl show_led |
| show_led: |
| li $r8, (CONFIG_DEBUG_LED) |
| swi $r7, [$r8] |
| ret |
| #endif /* #ifndef CONFIG_SKIP_LOWLEVEL_INIT */ |
