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 #ifdef CONFIG_OMAP
  12 #include <asm/omap_boot.h>
  13 #endif
  14
  15 /* Architecture-specific global data */
  16 struct arch_global_data {
  17 #if defined(CONFIG_FSL_ESDHC)
  18         u32 sdhc_clk;
  19 #endif
  20 #ifdef CONFIG_AT91FAMILY
  21         /* "static data" needed by at91's clock.c */
  22         unsigned long   cpu_clk_rate_hz;
  23         unsigned long   main_clk_rate_hz;
  24         unsigned long   mck_rate_hz;
  25         unsigned long   plla_rate_hz;
  26         unsigned long   pllb_rate_hz;
  27         unsigned long   at91_pllb_usb_init;
  28 #endif
  29         /* "static data" needed by most of timer.c on ARM platforms */
  30         unsigned long timer_rate_hz;
  31         unsigned long tbu;
  32         unsigned long tbl;
  33         unsigned long lastinc;
  34         unsigned long long timer_reset_value;
  35 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
  36         unsigned long tlb_addr;
  37         unsigned long tlb_size;
  38 #endif
  39
  40 #ifdef CONFIG_OMAP
  41         struct omap_boot_parameters omap_boot_params;
  42 #endif
  43 };
  44
  45 #include <asm-generic/global_data.h>
  46
  47 #ifdef __clang__
  48
  49 #define DECLARE_GLOBAL_DATA_PTR
  50 #define gd      get_gd()
  51
  52 static inline gd_t *get_gd(void)
  53 {
  54         gd_t *gd_ptr;
  55
  56 #ifdef CONFIG_ARM64
  57         /*
  58          * Make will already error that reserving x18 is not supported at the
  59          * time of writing, clang: error: unknown argument: '-ffixed-x18'
  60          */
  61         __asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr));
  62 #else
  63         __asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr));
  64 #endif
  65
  66         return gd_ptr;
  67 }
  68
  69 #else
  70
  71 #ifdef CONFIG_ARM64
  72 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("x18")
  73 #else
  74 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("r9")
  75 #endif
  76 #endif
  77
  78 #endif /* __ASM_GBL_DATA_H */