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/arch/clocks.h> 26 #include <asm/io.h> 27 #include <asm/omap_common.h> 28 #include <asm/arch/mux_omap4.h> 29 30 struct omap_sysinfo { 31 char *board_string; 32 }; 33 extern const struct omap_sysinfo sysinfo; 34 35 void gpmc_init(void); 36 void watchdog_init(void); 37 u32 get_device_type(void); 38 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 39 void set_muxconf_regs_essential(void); 40 void set_muxconf_regs_non_essential(void); 41 void sr32(void *, u32, u32, u32); 42 u32 wait_on_value(u32, u32, void *, u32); 43 void sdelay(unsigned long); 44 void set_pl310_ctrl_reg(u32 val); 45 void omap_rev_string(void); 46 void setup_clocks_for_console(void); 47 void prcm_init(void); 48 void bypass_dpll(u32 *const base); 49 void freq_update_core(void); 50 u32 get_sys_clk_freq(void); 51 u32 omap4_ddr_clk(void); 52 void cancel_out(u32 *num, u32 *den, u32 den_limit); 53 void sdram_init(void); 54 u32 omap_sdram_size(void); 55 u32 cortex_rev(void); 56 void init_omap_revision(void); 57 void do_io_settings(void); 58 /* 59 * This is used to verify if the configuration header 60 * was executed by Romcode prior to control of transfer 61 * to the bootloader. SPL is responsible for saving and 62 * passing this to the u-boot. 63 */ 64 extern struct omap_boot_parameters boot_params; 65 66 static inline u32 running_from_sdram(void) 67 { 68 u32 pc; 69 asm volatile ("mov %0, pc" : "=r" (pc)); 70 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) && 71 (pc < OMAP44XX_DRAM_ADDR_SPACE_END)); 72 } 73 74 static inline u8 uboot_loaded_by_spl(void) 75 { 76 /* 77 * u-boot can be running from sdram either because of configuration 78 * Header or by SPL. If because of CH, then the romcode sets the 79 * CHSETTINGS executed bit to true in the boot parameter structure that 80 * it passes to the bootloader.This parameter is stored in the ch_flags 81 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a 82 * mandatory section if CH is present. 83 */ 84 if ((boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS)) 85 return 0; 86 else 87 return running_from_sdram(); 88 } 89 /* 90 * The basic hardware init of OMAP(s_init()) can happen in 4 91 * different contexts: 92 * 1. SPL running from SRAM 93 * 2. U-Boot running from FLASH 94 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 95 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 96 * Configuration Header feature 97 * 98 * This function finds this context. 99 * Defining as inline may help in compiling out unused functions in SPL 100 */ 101 static inline u32 omap_hw_init_context(void) 102 { 103 #ifdef CONFIG_SPL_BUILD 104 return OMAP_INIT_CONTEXT_SPL; 105 #else 106 if (uboot_loaded_by_spl()) 107 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 108 else if (running_from_sdram()) 109 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 110 else 111 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 112 #endif 113 } 114 115 static inline u32 omap_revision(void) 116 { 117 extern u32 *const omap4_revision; 118 return *omap4_revision; 119 } 120 121 #endif 122