sys_proto.h 3.6 KB

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  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. #ifndef _SYS_PROTO_H_
  21. #define _SYS_PROTO_H_
  22. #include <asm/arch/omap.h>
  23. #include <asm/arch/clocks.h>
  24. #include <asm/io.h>
  25. #include <asm/omap_common.h>
  26. #include <asm/arch/mux_omap4.h>
  27. struct omap_sysinfo {
  28. char *board_string;
  29. };
  30. extern const struct omap_sysinfo sysinfo;
  31. void gpmc_init(void);
  32. void watchdog_init(void);
  33. u32 get_device_type(void);
  34. void do_set_mux(u32 base, struct pad_conf_entry const *array, int size);
  35. void set_muxconf_regs_essential(void);
  36. void set_muxconf_regs_non_essential(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);
  41. void setup_clocks_for_console(void);
  42. void prcm_init(void);
  43. void bypass_dpll(u32 const base);
  44. void freq_update_core(void);
  45. u32 get_sys_clk_freq(void);
  46. u32 omap4_ddr_clk(void);
  47. void cancel_out(u32 *num, u32 *den, u32 den_limit);
  48. void sdram_init(void);
  49. u32 omap_sdram_size(void);
  50. u32 cortex_rev(void);
  51. void init_omap_revision(void);
  52. void do_io_settings(void);
  53. void omap_vc_init(u16 speed_khz);
  54. int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data);
  55. u32 warm_reset(void);
  56. void force_emif_self_refresh(void);
  57. /*
  58. * This is used to verify if the configuration header
  59. * was executed by Romcode prior to control of transfer
  60. * to the bootloader. SPL is responsible for saving and
  61. * passing this to the u-boot.
  62. */
  63. extern struct omap_boot_parameters boot_params;
  64. static inline u32 running_from_sdram(void)
  65. {
  66. u32 pc;
  67. asm volatile ("mov %0, pc" : "=r" (pc));
  68. return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
  69. (pc < OMAP44XX_DRAM_ADDR_SPACE_END));
  70. }
  71. static inline u8 uboot_loaded_by_spl(void)
  72. {
  73. /*
  74. * u-boot can be running from sdram either because of configuration
  75. * Header or by SPL. If because of CH, then the romcode sets the
  76. * CHSETTINGS executed bit to true in the boot parameter structure that
  77. * it passes to the bootloader.This parameter is stored in the ch_flags
  78. * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a
  79. * mandatory section if CH is present.
  80. */
  81. if ((boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS))
  82. return 0;
  83. else
  84. return running_from_sdram();
  85. }
  86. /*
  87. * The basic hardware init of OMAP(s_init()) can happen in 4
  88. * different contexts:
  89. * 1. SPL running from SRAM
  90. * 2. U-Boot running from FLASH
  91. * 3. Non-XIP U-Boot loaded to SDRAM by SPL
  92. * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
  93. * Configuration Header feature
  94. *
  95. * This function finds this context.
  96. * Defining as inline may help in compiling out unused functions in SPL
  97. */
  98. static inline u32 omap_hw_init_context(void)
  99. {
  100. #ifdef CONFIG_SPL_BUILD
  101. return OMAP_INIT_CONTEXT_SPL;
  102. #else
  103. if (uboot_loaded_by_spl())
  104. return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
  105. else if (running_from_sdram())
  106. return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
  107. else
  108. return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;
  109. #endif
  110. }
  111. #endif