Robin Getz | 96f1050 | 2009-09-24 14:11:24 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004-2009 Analog Devices Inc. |
| 3 | * |
| 4 | * Licensed under the GPL-2 or later. |
| 5 | */ |
| 6 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 7 | #ifndef __ASM_BFIN_PROCESSOR_H |
| 8 | #define __ASM_BFIN_PROCESSOR_H |
| 9 | |
| 10 | /* |
| 11 | * Default implementation of macro that returns current |
| 12 | * instruction pointer ("program counter"). |
| 13 | */ |
| 14 | #define current_text_addr() ({ __label__ _l; _l: &&_l;}) |
| 15 | |
Mike Frysinger | d5ce528 | 2009-06-13 11:32:34 -0400 | [diff] [blame] | 16 | #include <asm/ptrace.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 17 | #include <asm/blackfin.h> |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 18 | |
| 19 | static inline unsigned long rdusp(void) |
| 20 | { |
| 21 | unsigned long usp; |
| 22 | |
| 23 | __asm__ __volatile__("%0 = usp;\n\t":"=da"(usp)); |
| 24 | return usp; |
| 25 | } |
| 26 | |
| 27 | static inline void wrusp(unsigned long usp) |
| 28 | { |
| 29 | __asm__ __volatile__("usp = %0;\n\t"::"da"(usp)); |
| 30 | } |
| 31 | |
Robin Getz | a45d575 | 2009-01-07 23:14:38 +0800 | [diff] [blame] | 32 | static inline unsigned long __get_SP(void) |
| 33 | { |
| 34 | unsigned long sp; |
| 35 | |
| 36 | __asm__ __volatile__("%0 = sp;\n\t" : "=da"(sp)); |
| 37 | return sp; |
| 38 | } |
| 39 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 40 | /* |
| 41 | * User space process size: 1st byte beyond user address space. |
Bernd Schmidt | d5adb02 | 2008-04-24 03:06:15 +0800 | [diff] [blame] | 42 | * Fairly meaningless on nommu. Parts of user programs can be scattered |
| 43 | * in a lot of places, so just disable this by setting it to 0xFFFFFFFF. |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 44 | */ |
Bernd Schmidt | d5adb02 | 2008-04-24 03:06:15 +0800 | [diff] [blame] | 45 | #define TASK_SIZE 0xFFFFFFFF |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 46 | |
David Howells | 922a70d | 2008-02-08 04:19:26 -0800 | [diff] [blame] | 47 | #ifdef __KERNEL__ |
| 48 | #define STACK_TOP TASK_SIZE |
| 49 | #endif |
| 50 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 51 | #define TASK_UNMAPPED_BASE 0 |
| 52 | |
| 53 | struct thread_struct { |
| 54 | unsigned long ksp; /* kernel stack pointer */ |
| 55 | unsigned long usp; /* user stack pointer */ |
| 56 | unsigned short seqstat; /* saved status register */ |
| 57 | unsigned long esp0; /* points to SR of stack frame pt_regs */ |
| 58 | unsigned long pc; /* instruction pointer */ |
| 59 | void * debuggerinfo; |
| 60 | }; |
| 61 | |
| 62 | #define INIT_THREAD { \ |
| 63 | sizeof(init_stack) + (unsigned long) init_stack, 0, \ |
| 64 | PS_S, 0, 0 \ |
| 65 | } |
| 66 | |
Mike Frysinger | d5ce528 | 2009-06-13 11:32:34 -0400 | [diff] [blame] | 67 | extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
| 68 | unsigned long new_sp); |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 69 | |
| 70 | /* Forward declaration, a strange C thing */ |
| 71 | struct task_struct; |
| 72 | |
| 73 | /* Free all resources held by a thread. */ |
| 74 | static inline void release_thread(struct task_struct *dead_task) |
| 75 | { |
| 76 | } |
| 77 | |
| 78 | #define prepare_to_copy(tsk) do { } while (0) |
| 79 | |
| 80 | extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags); |
| 81 | |
| 82 | /* |
| 83 | * Free current thread data structures etc.. |
| 84 | */ |
| 85 | static inline void exit_thread(void) |
| 86 | { |
| 87 | } |
| 88 | |
| 89 | /* |
| 90 | * Return saved PC of a blocked thread. |
| 91 | */ |
| 92 | #define thread_saved_pc(tsk) (tsk->thread.pc) |
| 93 | |
| 94 | unsigned long get_wchan(struct task_struct *p); |
| 95 | |
| 96 | #define KSTK_EIP(tsk) \ |
| 97 | ({ \ |
| 98 | unsigned long eip = 0; \ |
| 99 | if ((tsk)->thread.esp0 > PAGE_SIZE && \ |
| 100 | MAP_NR((tsk)->thread.esp0) < max_mapnr) \ |
| 101 | eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \ |
| 102 | eip; }) |
| 103 | #define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp) |
| 104 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 105 | #define cpu_relax() smp_mb() |
| 106 | |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 107 | |
| 108 | /* Get the Silicon Revision of the chip */ |
Ralf Baechle | e8c4431 | 2007-10-18 03:07:07 -0700 | [diff] [blame] | 109 | static inline uint32_t __pure bfin_revid(void) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 110 | { |
Robin Getz | bc4d6f3 | 2009-04-23 14:15:04 +0000 | [diff] [blame] | 111 | /* Always use CHIPID, to work around ANOMALY_05000234 */ |
| 112 | uint32_t revid = (bfin_read_CHIPID() & CHIPID_VERSION) >> 28; |
Michael Hennerich | 0138da6 | 2008-07-19 16:56:53 +0800 | [diff] [blame] | 113 | |
Graf Yang | 10a5ecd | 2009-07-01 04:08:01 +0000 | [diff] [blame] | 114 | #ifdef _BOOTROM_GET_DXE_ADDRESS_TWI |
| 115 | /* |
| 116 | * ANOMALY_05000364 |
Michael Hennerich | 0138da6 | 2008-07-19 16:56:53 +0800 | [diff] [blame] | 117 | * Incorrect Revision Number in DSPID Register |
| 118 | */ |
Graf Yang | 10a5ecd | 2009-07-01 04:08:01 +0000 | [diff] [blame] | 119 | if (ANOMALY_05000364 && |
| 120 | bfin_read16(_BOOTROM_GET_DXE_ADDRESS_TWI) == 0x2796) |
| 121 | revid = 1; |
Michael Hennerich | 0138da6 | 2008-07-19 16:56:53 +0800 | [diff] [blame] | 122 | #endif |
Graf Yang | 10a5ecd | 2009-07-01 04:08:01 +0000 | [diff] [blame] | 123 | |
Michael Hennerich | 0138da6 | 2008-07-19 16:56:53 +0800 | [diff] [blame] | 124 | return revid; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Robin Getz | e482cad | 2008-10-10 18:21:45 +0800 | [diff] [blame] | 127 | static inline uint16_t __pure bfin_cpuid(void) |
| 128 | { |
| 129 | return (bfin_read_CHIPID() & CHIPID_FAMILY) >> 12; |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 130 | } |
Robin Getz | e482cad | 2008-10-10 18:21:45 +0800 | [diff] [blame] | 131 | |
Graf Yang | 6b3087c | 2009-01-07 23:14:39 +0800 | [diff] [blame] | 132 | static inline uint32_t __pure bfin_dspid(void) |
| 133 | { |
| 134 | return bfin_read_DSPID(); |
Robin Getz | e482cad | 2008-10-10 18:21:45 +0800 | [diff] [blame] | 135 | } |
| 136 | |
Ralf Baechle | e8c4431 | 2007-10-18 03:07:07 -0700 | [diff] [blame] | 137 | static inline uint32_t __pure bfin_compiled_revid(void) |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 138 | { |
| 139 | #if defined(CONFIG_BF_REV_0_0) |
| 140 | return 0; |
| 141 | #elif defined(CONFIG_BF_REV_0_1) |
| 142 | return 1; |
| 143 | #elif defined(CONFIG_BF_REV_0_2) |
| 144 | return 2; |
| 145 | #elif defined(CONFIG_BF_REV_0_3) |
| 146 | return 3; |
| 147 | #elif defined(CONFIG_BF_REV_0_4) |
| 148 | return 4; |
| 149 | #elif defined(CONFIG_BF_REV_0_5) |
| 150 | return 5; |
Bryan Wu | 2e8ca59 | 2008-11-18 17:48:22 +0800 | [diff] [blame] | 151 | #elif defined(CONFIG_BF_REV_0_6) |
| 152 | return 6; |
Jie Zhang | de3025f | 2007-06-25 18:04:12 +0800 | [diff] [blame] | 153 | #elif defined(CONFIG_BF_REV_ANY) |
| 154 | return 0xffff; |
| 155 | #else |
| 156 | return -1; |
Bryan Wu | 1394f03 | 2007-05-06 14:50:22 -0700 | [diff] [blame] | 157 | #endif |
| 158 | } |
| 159 | |
| 160 | #endif |