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/omap4.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 extern struct omap4_prcm_regs *const prcm; 36 37 void gpmc_init(void); 38 void watchdog_init(void); 39 u32 get_device_type(void); 40 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 41 void set_muxconf_regs_non_essential(void); 42 void sr32(void *, u32, u32, u32); 43 u32 wait_on_value(u32, u32, void *, u32); 44 void sdelay(unsigned long); 45 void set_pl310_ctrl_reg(u32 val); 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 omap4_sdram_size(void); 55 56 static inline u32 running_from_sdram(void) 57 { 58 u32 pc; 59 asm volatile ("mov %0, pc" : "=r" (pc)); 60 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) && 61 (pc < OMAP44XX_DRAM_ADDR_SPACE_END)); 62 } 63 64 static inline u8 uboot_loaded_by_spl(void) 65 { 66 /* 67 * Configuration Header is not supported yet, so u-boot init running 68 * from SDRAM implies that it was loaded by SPL. When this situation 69 * changes one of these approaches could be taken: 70 * i. Pass a magic from SPL to U-Boot and U-Boot save it at a known 71 * location. 72 * ii. Check the OPP. CH can support only 50% OPP while SPL initializes 73 * the DPLLs at 100% OPP. 74 */ 75 return running_from_sdram(); 76 } 77 /* 78 * The basic hardware init of OMAP(s_init()) can happen in 4 79 * different contexts: 80 * 1. SPL running from SRAM 81 * 2. U-Boot running from FLASH 82 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 83 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 84 * Configuration Header feature 85 * 86 * This function finds this context. 87 * Defining as inline may help in compiling out unused functions in SPL 88 */ 89 static inline u32 omap4_hw_init_context(void) 90 { 91 #ifdef CONFIG_SPL_BUILD 92 return OMAP_INIT_CONTEXT_SPL; 93 #else 94 if (uboot_loaded_by_spl()) 95 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 96 else if (running_from_sdram()) 97 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 98 else 99 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 100 #endif 101 } 102 103 static inline u32 omap_revision(void) 104 { 105 extern u32 *const omap4_revision; 106 return *omap4_revision; 107 } 108 109 #endif 110