headers/private/kernel/arch/arm/arch_cpu.h

   1 /*
   2 ** Copyright 2003-2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   3 ** Distributed under the terms of the Haiku License.
   4 */
   5 #ifndef _KERNEL_ARCH_ARM_CPU_H
   6 #define _KERNEL_ARCH_ARM_CPU_H
   7
   8
   9 #define CPU_MAX_CACHE_LEVEL 8
  10 #define CACHE_LINE_SIZE 64
  11         // TODO: Could be 32-bits sometimes?
  12
  13
  14 #ifndef _ASSEMBLER
  15
  16 #include <arch/arm/arch_thread_types.h>
  17 #include <kernel.h>
  18
  19
  20 /* raw exception frames */
  21 struct iframe {
  22         uint32 spsr;
  23         uint32 r0;
  24         uint32 r1;
  25         uint32 r2;
  26         uint32 r3;
  27         uint32 r4;
  28         uint32 r5;
  29         uint32 r6;
  30         uint32 r7;
  31         uint32 r8;
  32         uint32 r9;
  33         uint32 r10;
  34         uint32 r11;
  35         uint32 r12;
  36         uint32 usr_sp;
  37         uint32 usr_lr;
  38         uint32 svc_sp;
  39         uint32 svc_lr;
  40         uint32 pc;
  41 } _PACKED;
  42
  43 /**! Values for arch_cpu_info.arch */
  44 enum {
  45         ARCH_ARM_PRE_ARM7,
  46         ARCH_ARM_v3,
  47         ARCH_ARM_v4,
  48         ARCH_ARM_v4T,
  49         ARCH_ARM_v5,
  50         ARCH_ARM_v5T,
  51         ARCH_ARM_v5TE,
  52         ARCH_ARM_v5TEJ,
  53         ARCH_ARM_v6,
  54         ARCH_ARM_v7
  55 };
  56
  57 typedef struct arch_cpu_info {
  58         /* For a detailed interpretation of these values,
  59            see "The System Control coprocessor",
  60            "Main ID register" in your ARM ARM */
  61         int implementor;
  62         int part_number;
  63         int revision;
  64         int variant;
  65         int arch;
  66 } arch_cpu_info;
  67
  68 #ifdef __cplusplus
  69 extern "C" {
  70 #endif
  71
  72 extern addr_t arm_get_far(void);
  73 extern int32 arm_get_fsr(void);
  74 extern addr_t arm_get_fp(void);
  75
  76 extern int mmu_read_c1(void);
  77 extern int mmu_write_c1(int val);
  78
  79
  80 static inline void
  81 arch_cpu_pause(void)
  82 {
  83         // TODO: ARM Priority pause call
  84 }
  85
  86
  87 static inline void
  88 arch_cpu_idle(void)
  89 {
  90         uint32 Rd = 0;
  91         asm volatile("mcr p15, 0, %[c7format], c7, c0, 4"
  92                 : : [c7format] "r" (Rd) );
  93 }
  94
  95
  96 #ifdef __cplusplus
  97 };
  98 #endif
  99
 100 #endif  // !_ASSEMBLER
 101
 102 #endif  /* _KERNEL_ARCH_ARM_CPU_H */