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/omap4.h>
26 #include <asm/omap_common.h>
31 extern const struct omap_sysinfo sysinfo;
34 void watchdog_init(void);
35 u32 get_device_type(void);
36 void set_muxconf_regs(void);
37 void sr32(void *, u32, u32, u32);
38 u32 wait_on_value(u32, u32, void *, u32);
39 void sdelay(unsigned long);
40 void set_pl310_ctrl_reg(u32 val);
42 static inline u32 running_from_sdram(void)
45 asm volatile ("mov %0, pc" : "=r" (pc));
46 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
47 (pc < OMAP44XX_DRAM_ADDR_SPACE_END));
50 static inline u8 uboot_loaded_by_spl(void)
53 * Configuration Header is not supported yet, so u-boot init running
54 * from SDRAM implies that it was loaded by SPL. When this situation
55 * changes one of these approaches could be taken:
56 * i. Pass a magic from SPL to U-Boot and U-Boot save it at a known
58 * ii. Check the OPP. CH can support only 50% OPP while SPL initializes
59 * the DPLLs at 100% OPP.
61 return running_from_sdram();
64 * The basic hardware init of OMAP(s_init()) can happen in 4
66 * 1. SPL running from SRAM
67 * 2. U-Boot running from FLASH
68 * 3. Non-XIP U-Boot loaded to SDRAM by SPL
69 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
70 * Configuration Header feature
72 * This function finds this context.
73 * Defining as inline may help in compiling out unused functions in SPL
75 static inline u32 omap4_hw_init_context(void)
77 #ifdef CONFIG_SPL_BUILD
78 return OMAP_INIT_CONTEXT_SPL;
80 if (uboot_loaded_by_spl())
81 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
82 else if (running_from_sdram())
83 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
85 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;