projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 939911a6 TR |
1 | /* |
| 2 | * (C) Copyright 2014 | |
| 3 | * Texas Instruments, <www.ti.com> | |
| 4 | * | |
| 5 | * SPDX-License-Identifier: GPL-2.0+ | |
| 6 | */ | |
| 7 | #ifndef _TI_COMMON_SYS_PROTO_H_ | |
| 8 | #define _TI_COMMON_SYS_PROTO_H_ | |
| 9 | ||
| 10 | DECLARE_GLOBAL_DATA_PTR; | |
| 11 | ||
| a93fbf4a | 12 | #ifdef CONFIG_ARCH_OMAP2PLUS |
| 939911a6 TR |
13 | #define TI_ARMV7_DRAM_ADDR_SPACE_START 0x80000000 |
| 14 | #define TI_ARMV7_DRAM_ADDR_SPACE_END 0xFFFFFFFF | |
| 15 | ||
| 16 | #define OMAP_INIT_CONTEXT_SPL 0 | |
| 17 | #define OMAP_INIT_CONTEXT_UBOOT_FROM_NOR 1 | |
| 18 | #define OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL 2 | |
| 19 | #define OMAP_INIT_CONTEXT_UBOOT_AFTER_CH 3 | |
| 20 | ||
| 21 | static inline u32 running_from_sdram(void) | |
| 22 | { | |
| 23 | u32 pc; | |
| 24 | asm volatile ("mov %0, pc" : "=r" (pc)); | |
| 25 | return ((pc >= TI_ARMV7_DRAM_ADDR_SPACE_START) && | |
| 26 | (pc < TI_ARMV7_DRAM_ADDR_SPACE_END)); | |
| 27 | } | |
| 28 | ||
| 29 | static inline u8 uboot_loaded_by_spl(void) | |
| 30 | { | |
| 31 | /* | |
| 32 | * u-boot can be running from sdram either because of configuration | |
| 33 | * Header or by SPL. If because of CH, then the romcode sets the | |
| 34 | * CHSETTINGS executed bit to true in the boot parameter structure that | |
| 35 | * it passes to the bootloader.This parameter is stored in the ch_flags | |
| 36 | * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a | |
| 37 | * mandatory section if CH is present. | |
| 38 | */ | |
| 60c7c30a | 39 | if (gd->arch.omap_ch_flags & CH_FLAGS_CHSETTINGS) |
| 939911a6 TR |
40 | return 0; |
| 41 | else | |
| 42 | return running_from_sdram(); | |
| 43 | } | |
| 44 | ||
| 45 | /* | |
| 46 | * The basic hardware init of OMAP(s_init()) can happen in 4 | |
| 47 | * different contexts: | |
| 48 | * 1. SPL running from SRAM | |
| 49 | * 2. U-Boot running from FLASH | |
| 50 | * 3. Non-XIP U-Boot loaded to SDRAM by SPL | |
| 51 | * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the | |
| 52 | * Configuration Header feature | |
| 53 | * | |
| 54 | * This function finds this context. | |
| 55 | * Defining as inline may help in compiling out unused functions in SPL | |
| 56 | */ | |
| 57 | static inline u32 omap_hw_init_context(void) | |
| 58 | { | |
| 59 | #ifdef CONFIG_SPL_BUILD | |
| 60 | return OMAP_INIT_CONTEXT_SPL; | |
| 61 | #else | |
| 62 | if (uboot_loaded_by_spl()) | |
| 63 | return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; | |
| 64 | else if (running_from_sdram()) | |
| 65 | return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; | |
| 66 | else | |
| 67 | return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; | |
| 68 | #endif | |
| 69 | } | |
| 70 | #endif | |
| 71 | ||
| 72 | #endif |