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
  21 #if defined(CONFIG_U_QE)
  22         u32 qe_clk;
  23         u32 brg_clk;
  24         uint mp_alloc_base;
  25         uint mp_alloc_top;
  26 #endif /* CONFIG_U_QE */
  27
  28 #ifdef CONFIG_AT91FAMILY
  29         /* "static data" needed by at91's clock.c */
  30         unsigned long   cpu_clk_rate_hz;
  31         unsigned long   main_clk_rate_hz;
  32         unsigned long   mck_rate_hz;
  33         unsigned long   plla_rate_hz;
  34         unsigned long   pllb_rate_hz;
  35         unsigned long   at91_pllb_usb_init;
  36 #endif
  37         /* "static data" needed by most of timer.c on ARM platforms */
  38         unsigned long timer_rate_hz;
  39         unsigned long tbu;
  40         unsigned long tbl;
  41         unsigned long lastinc;
  42         unsigned long long timer_reset_value;
  43 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
  44         unsigned long tlb_addr;
  45         unsigned long tlb_size;
  46 #endif
  47
  48 #ifdef CONFIG_OMAP
  49         struct omap_boot_parameters omap_boot_params;
  50 #endif
  51 #ifdef CONFIG_FSL_LSCH3
  52         unsigned long mem2_clk;
  53 #endif
  54 };
  55
  56 #include <asm-generic/global_data.h>
  57
  58 #ifdef __clang__
  59
  60 #define DECLARE_GLOBAL_DATA_PTR
  61 #define gd      get_gd()
  62
  63 static inline gd_t *get_gd(void)
  64 {
  65         gd_t *gd_ptr;
  66
  67 #ifdef CONFIG_ARM64
  68         /*
  69          * Make will already error that reserving x18 is not supported at the
  70          * time of writing, clang: error: unknown argument: '-ffixed-x18'
  71          */
  72         __asm__ volatile("mov %0, x18\n" : "=r" (gd_ptr));
  73 #else
  74         __asm__ volatile("mov %0, r9\n" : "=r" (gd_ptr));
  75 #endif
  76
  77         return gd_ptr;
  78 }
  79
  80 #else
  81
  82 #ifdef CONFIG_ARM64
  83 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("x18")
  84 #else
  85 #define DECLARE_GLOBAL_DATA_PTR         register volatile gd_t *gd asm ("r9")
  86 #endif
  87 #endif
  88
  89 #endif /* __ASM_GBL_DATA_H */