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/io.h> 26 #include <asm/omap_common.h> 27 #include <asm/arch/mux_omap4.h> 28 29 struct omap_sysinfo { 30 char *board_string; 31 }; 32 extern const struct omap_sysinfo sysinfo; 33 34 void gpmc_init(void); 35 void watchdog_init(void); 36 u32 get_device_type(void); 37 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size); 38 void set_muxconf_regs_non_essential(void); 39 void sr32(void *, u32, u32, u32); 40 u32 wait_on_value(u32, u32, void *, u32); 41 void sdelay(unsigned long); 42 void set_pl310_ctrl_reg(u32 val); 43 void omap_rev_string(char *omap4_rev_string); 44 45 static inline u32 running_from_sdram(void) 46 { 47 u32 pc; 48 asm volatile ("mov %0, pc" : "=r" (pc)); 49 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) && 50 (pc < OMAP44XX_DRAM_ADDR_SPACE_END)); 51 } 52 53 static inline u8 uboot_loaded_by_spl(void) 54 { 55 /* 56 * Configuration Header is not supported yet, so u-boot init running 57 * from SDRAM implies that it was loaded by SPL. When this situation 58 * changes one of these approaches could be taken: 59 * i. Pass a magic from SPL to U-Boot and U-Boot save it at a known 60 * location. 61 * ii. Check the OPP. CH can support only 50% OPP while SPL initializes 62 * the DPLLs at 100% OPP. 63 */ 64 return running_from_sdram(); 65 } 66 /* 67 * The basic hardware init of OMAP(s_init()) can happen in 4 68 * different contexts: 69 * 1. SPL running from SRAM 70 * 2. U-Boot running from FLASH 71 * 3. Non-XIP U-Boot loaded to SDRAM by SPL 72 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the 73 * Configuration Header feature 74 * 75 * This function finds this context. 76 * Defining as inline may help in compiling out unused functions in SPL 77 */ 78 static inline u32 omap4_hw_init_context(void) 79 { 80 #ifdef CONFIG_SPL_BUILD 81 return OMAP_INIT_CONTEXT_SPL; 82 #else 83 if (uboot_loaded_by_spl()) 84 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL; 85 else if (running_from_sdram()) 86 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH; 87 else 88 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR; 89 #endif 90 } 91 92 static inline u32 omap_revision(void) 93 { 94 extern u32 *const omap4_revision; 95 return *omap4_revision; 96 } 97 98 #endif 99