arch/arm/include/asm/secure.h

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