3 * Texas Instruments, <www.ti.com>
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.
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.
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,
24 #include <asm/arch/omap.h>
25 #include <asm/arch/clocks.h>
27 #include <asm/omap_common.h>
28 #include <asm/arch/mux_omap4.h>
30 DECLARE_GLOBAL_DATA_PTR;
35 extern const struct omap_sysinfo sysinfo;
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_essential(void);
42 void set_muxconf_regs_non_essential(void);
43 void sr32(void *, u32, u32, u32);
44 u32 wait_on_value(u32, u32, void *, u32);
45 void sdelay(unsigned long);
46 void set_pl310_ctrl_reg(u32 val);
47 void setup_clocks_for_console(void);
49 void bypass_dpll(u32 const base);
50 void freq_update_core(void);
51 u32 get_sys_clk_freq(void);
52 u32 omap4_ddr_clk(void);
53 void cancel_out(u32 *num, u32 *den, u32 den_limit);
54 void sdram_init(void);
55 u32 omap_sdram_size(void);
57 void init_omap_revision(void);
58 void do_io_settings(void);
59 void omap_vc_init(u16 speed_khz);
60 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data);
62 void force_emif_self_refresh(void);
63 void setup_warmreset_time(void);
65 static inline u32 running_from_sdram(void)
68 asm volatile ("mov %0, pc" : "=r" (pc));
69 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
70 (pc < OMAP44XX_DRAM_ADDR_SPACE_END));
73 static inline u8 uboot_loaded_by_spl(void)
76 * u-boot can be running from sdram either because of configuration
77 * Header or by SPL. If because of CH, then the romcode sets the
78 * CHSETTINGS executed bit to true in the boot parameter structure that
79 * it passes to the bootloader.This parameter is stored in the ch_flags
80 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a
81 * mandatory section if CH is present.
83 if ((gd->arch.omap_boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS))
86 return running_from_sdram();
89 * The basic hardware init of OMAP(s_init()) can happen in 4
91 * 1. SPL running from SRAM
92 * 2. U-Boot running from FLASH
93 * 3. Non-XIP U-Boot loaded to SDRAM by SPL
94 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
95 * Configuration Header feature
97 * This function finds this context.
98 * Defining as inline may help in compiling out unused functions in SPL
100 static inline u32 omap_hw_init_context(void)
102 #ifdef CONFIG_SPL_BUILD
103 return OMAP_INIT_CONTEXT_SPL;
105 if (uboot_loaded_by_spl())
106 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
107 else if (running_from_sdram())
108 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
110 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;