arch/arm/include/asm/global_data.h

   1 /*
   2  * (C) Copyright 2002-2010
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __ASM_GBL_DATA_H
   9 #define __ASM_GBL_DATA_H
  10
  11 /* Architecture-specific global data */
  12 struct arch_global_data {
  13 #if defined(CONFIG_FSL_ESDHC)
  14         u32 sdhc_clk;
  15 #endif
  16
  17 #if defined(CONFIG_U_QE)
  18         u32 qe_clk;
  19         u32 brg_clk;
  20         uint mp_alloc_base;
  21         uint mp_alloc_top;
  22 #endif /* CONFIG_U_QE */
  23
  24 #ifdef CONFIG_AT91FAMILY
  25         /* "static data" needed by at91's clock.c */
  26         unsigned long   cpu_clk_rate_hz;
  27         unsigned long   main_clk_rate_hz;
  28         unsigned long   mck_rate_hz;
  29         unsigned long   plla_rate_hz;
  30         unsigned long   pllb_rate_hz;
  31         unsigned long   at91_pllb_usb_init;
  32 #endif
  33         /* "static data" needed by most of timer.c on ARM platforms */
  34         unsigned long timer_rate_hz;
  35         unsigned long tbu;
  36         unsigned long tbl;
  37         unsigned long lastinc;
  38         unsigned long long timer_reset_value;
  39 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
  40         unsigned long tlb_addr;
  41         unsigned long tlb_size;
  42 #endif
  43
  44 #ifdef CONFIG_OMAP_COMMON
  45         u32 omap_boot_device;
  46         u32 omap_boot_mode;
  47         u8 omap_ch_flags;
  48 #endif
  49 #if defined(CONFIG_FSL_LSCH3) && defined(CONFIG_SYS_FSL_HAS_DP_DDR)
  50         unsigned long mem2_clk;
  51 #endif
  52 };
  53
  54 #include <asm-generic/global_data.h>
  55
  56 #ifdef __clang__
  57
  58 #define DECLARE_GLOBAL_DATA_PTR
  59 #define gd      get_gd()
  60
  61 static inline gd_t *get_gd(void)
  62 {
  63         gd_t *gd_ptr;
  64
  65 #ifdef CONFIG_ARM64
  66         /*
  67          * Make will already error that reserving x18 is not supported at the
  68          * time of writing, clang: error: unknown argument: '-ffixed-x18'
  69          */
  70         __asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr));
  71 #else
  72         __asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr));
  73 #endif
  74
  75         return gd_ptr;
  76 }
  77
  78 #else
  79
  80 #ifdef CONFIG_ARM64
  81 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("x18")
  82 #else
  83 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("r9")
  84 #endif
  85 #endif
  86
  87 #endif /* __ASM_GBL_DATA_H */