arch/arm/include/asm/secure.h

   1 #ifndef __ASM_SECURE_H
   2 #define __ASM_SECURE_H
   3
   4 #include <config.h>
   5 #include <asm/global_data.h>
   6
   7 #define __secure __section("._secure.text")
   8 #define __secure_data __section("._secure.data")
   9
  10 #ifndef __ASSEMBLY__
  11
  12 typedef struct secure_svc_tbl {
  13         u32     id;
  14 #ifdef CONFIG_ARMV8_PSCI
  15         u8      pad[4];
  16 #endif
  17         void    *func;
  18 } secure_svc_tbl_t;
  19
  20 /*
  21  * Macro to declare a SiP function service in '_secure_svc_tbl_entries' section
  22  */
  23 #define DECLARE_SECURE_SVC(_name, _id, _fn) \
  24         static const secure_svc_tbl_t __secure_svc_ ## _name \
  25                 __used __section("._secure_svc_tbl_entries") \
  26                          = { \
  27                                 .id = _id, \
  28                                 .func = _fn }
  29
  30 #else
  31
  32 #ifdef CONFIG_ARMV8_PSCI
  33 #define SECURE_SVC_TBL_OFFSET           16
  34 #else
  35 #define SECURE_SVC_TBL_OFFSET           8
  36
  37 #endif
  38
  39 #endif /* __ASSEMBLY__ */
  40
  41 #if defined(CONFIG_ARMV7_SECURE_BASE) || defined(CONFIG_ARMV8_SECURE_BASE)
  42 /*
  43  * Warning, horror ahead.
  44  *
  45  * The target code lives in our "secure ram", but u-boot doesn't know
  46  * that, and has blindly added reloc_off to every relocation
  47  * entry. Gahh. Do the opposite conversion. This hack also prevents
  48  * GCC from generating code veeners, which u-boot doesn't relocate at
  49  * all...
  50  */
  51 #define secure_ram_addr(_fn) ({                                         \
  52                         DECLARE_GLOBAL_DATA_PTR;                        \
  53                         void *__fn = _fn;                               \
  54                         typeof(_fn) *__tmp = (__fn - gd->reloc_off);    \
  55                         __tmp;                                          \
  56                 })
  57 #else
  58 #define secure_ram_addr(_fn)    (_fn)
  59 #endif
  60
  61 #endif