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>
26 #include <asm/arch/clocks.h>
27 #include <asm/omap_common.h>
28 #include <asm/arch/mux_omap5.h>
33 extern const struct omap_sysinfo sysinfo;
35 extern struct omap5_prcm_regs *const prcm;
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 omap_rev_string(char *omap_rev_string);
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 omap5_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);
61 * This is used to verify if the configuration header
62 * was executed by Romcode prior to control of transfer
63 * to the bootloader. SPL is responsible for saving and
64 * passing this to the u-boot.
66 extern struct omap_boot_parameters boot_params;
68 static inline u32 running_from_sdram(void)
71 asm volatile ("mov %0, pc" : "=r" (pc));
72 return ((pc >= OMAP54XX_DRAM_ADDR_SPACE_START) &&
73 (pc < OMAP54XX_DRAM_ADDR_SPACE_END));
76 static inline u8 uboot_loaded_by_spl(void)
79 * Configuration Header is not supported yet, so u-boot init running
80 * from SDRAM implies that it was loaded by SPL. When this situation
81 * changes one of these approaches could be taken:
82 * i. Pass a magic from SPL to U-Boot and U-Boot save it at a known
84 * ii. Check the OPP. CH can support only 50% OPP while SPL initializes
85 * the DPLLs at 100% OPP.
87 return running_from_sdram();
90 * The basic hardware init of OMAP(s_init()) can happen in 4
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
98 * This function finds this context.
99 * Defining as inline may help in compiling out unused functions in SPL
101 static inline u32 omap_hw_init_context(void)
103 #ifdef CONFIG_SPL_BUILD
104 return OMAP_INIT_CONTEXT_SPL;
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;
111 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;
115 static inline u32 omap_revision(void)
117 extern u32 *const omap5_revision;
118 return *omap5_revision;