1 /* 2 * (C) Copyright 2010 3 * Texas Instruments, <www.ti.com> 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation; either version 2 of 8 * the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 18 * MA 02111-1307 USA 19 */ 20 21 #ifndef _SYS_PROTO_H_ 22 #define _SYS_PROTO_H_ 23 24 #include <asm/arch/omap.h> 25 #include <asm/io.h> 26 #include <asm/arch/clocks.h> 27 #include <asm/omap_common.h> 28 #include <asm/arch/clocks.h> 29 30 struct pad_conf_entry { 31 u32 offset; 32 u32 val; 33 }; 34 35 struct omap_sysinfo { 36 char *board_string; 37 }; 38 extern const struct omap_sysinfo sysinfo; 39 40 void gpmc_init(void); 41 void watchdog_init(void); 42 u32 get_device_type(void); 43 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 44 void set_muxconf_regs_essential(void); 45 void set_muxconf_regs_non_essential(void); 46 void sr32(void *, u32, u32, u32); 47 u32 wait_on_value(u32, u32, void *, u32); 48 void sdelay(unsigned long); 49 void setup_clocks_for_console(void); 50 void prcm_init(void); 51 void bypass_dpll(u32 const base); 52 void freq_update_core(void); 53 u32 get_sys_clk_freq(void); 54 u32 omap5_ddr_clk(void); 55 void cancel_out(u32 *num, u32 *den, u32 den_limit); 56 void sdram_init(void); 57 u32 omap_sdram_size(void); 58 u32 cortex_rev(void); 59 void init_omap_revision(void); 60 void do_io_settings(void); 61 void omap_vc_init(u16 speed_khz); 62 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data); 63 u32 warm_reset(void); 64 void force_emif_self_refresh(void); 65 void get_ioregs(const struct ctrl_ioregs **regs); 66 void srcomp_enable(void); 67 68 /* 69 * This is used to verify if the configuration header 70 * was executed by Romcode prior to control of transfer 71 * to the bootloader. SPL is responsible for saving and 72 * passing this to the u-boot. 73 */ 74 extern struct omap_boot_parameters boot_params; 75 76 static inline u32 running_from_sdram(void) 77 { 78 u32 pc; 79 asm volatile ("mov %0, pc" : "=r" (pc)); 80 return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) && 81 (pc < OMAP54XX_DRAM_ADDR_SPACE_END)); 82 } 83 84 static inline u8 uboot_loaded_by_spl(void) 85 { 86 /* 87 * u-boot can be running from sdram either because of configuration 88 * Header or by SPL. If because of CH, then the romcode sets the 89 * CHSETTINGS executed bit to true in the boot parameter structure that 90 * it passes to the bootloader.This parameter is stored in the ch_flags 91 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a 92 * mandatory section if CH is present. 93 */ 94 if ((boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) 95 return 0; 96 else 97 return running_from_sdram(); 98 } 99 /* 100 * The basic hardware init of OMAP(s_init()) can happen in 4 101 * different contexts: 102 * 1. SPL running from SRAM 103 * 2. U-Boot running from FLASH 104 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 105 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 106 * Configuration Header feature 107 * 108 * This function finds this context. 109 * Defining as inline may help in compiling out unused functions in SPL 110 */ 111 static inline u32 omap_hw_init_context(void) 112 { 113 #ifdef CONFIG_SPL_BUILD 114 return OMAP_INIT_CONTEXT_SPL; 115 #else 116 if (uboot_loaded_by_spl()) 117 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 118 else if (running_from_sdram()) 119 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 120 else 121 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 122 #endif 123 } 124 125 #endif 126