text: /*
   * (C) Copyright 2010
   * Texas Instruments, <www.ti.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  #ifndef _SYS_PROTO_H_
  #define _SYS_PROTO_H_
  
  #include <asm/arch/omap4.h>
  #include <asm/arch/clocks.h>
  #include <asm/io.h>
  #include <asm/omap_common.h>
  #include <asm/arch/mux_omap4.h>
  
  struct omap_sysinfo {
  	char *board_string;
  };
  extern const struct omap_sysinfo sysinfo;
  
  extern struct omap4_prcm_regs *const prcm;
  
  void gpmc_init(void);
  void watchdog_init(void);
  u32 get_device_type(void);
  void do_set_mux(u32 base, struct pad_conf_entry const *array, int size);
  void set_muxconf_regs_non_essential(void);
  void sr32(void *, u32, u32, u32);
  u32 wait_on_value(u32, u32, void *, u32);
  void sdelay(unsigned long);
  void set_pl310_ctrl_reg(u32 val);
  void omap_rev_string(char *omap4_rev_string);
  void setup_clocks_for_console(void);
  void prcm_init(void);
  void bypass_dpll(u32 *const base);
  void freq_update_core(void);
  u32 get_sys_clk_freq(void);
  u32 omap4_ddr_clk(void);
  void cancel_out(u32 *num, u32 *den, u32 den_limit);
  void sdram_init(void);
  u32 omap4_sdram_size(void);
  
  static inline u32 running_from_sdram(void)
  {
  	u32 pc;
  	asm volatile ("mov %0, pc" : "=r" (pc));
  	return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
  	    (pc < OMAP44XX_DRAM_ADDR_SPACE_END));
  }
  
  static inline u8 uboot_loaded_by_spl(void)
  {
  	/*
  	 * Configuration Header is not supported yet, so u-boot init running
  	 * from SDRAM implies that it was loaded by SPL. When this situation
  	 * changes one of these approaches could be taken:
  	 * i.  Pass a magic from SPL to U-Boot and U-Boot save it at a known
  	 *     location.
  	 * ii. Check the OPP. CH can support only 50% OPP while SPL initializes
  	 *     the DPLLs at 100% OPP.
  	 */
  	return running_from_sdram();
  }
  /*
   * The basic hardware init of OMAP(s_init()) can happen in 4
   * different contexts:
   *  1. SPL running from SRAM
   *  2. U-Boot running from FLASH
   *  3. Non-XIP U-Boot loaded to SDRAM by SPL
   *  4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
   *     Configuration Header feature
   *
   * This function finds this context.
   * Defining as inline may help in compiling out unused functions in SPL
   */
  static inline u32 omap4_hw_init_context(void)
  {
  #ifdef CONFIG_SPL_BUILD
  	return OMAP_INIT_CONTEXT_SPL;
  #else
  	if (uboot_loaded_by_spl())
  		return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
  	else if (running_from_sdram())
  		return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
  	else
  		return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;
  #endif
  }
  
  static inline u32 omap_revision(void)
  {
  	extern u32 *const omap4_revision;
  	return *omap4_revision;
  }
  
  #endif
  