1#ifndef _ASM_IA64_SYSTEM_H
2#define _ASM_IA64_SYSTEM_H
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16#include <asm/kregs.h>
17#include <asm/page.h>
18#include <asm/pal.h>
19#include <asm/percpu.h>
20
21#define GATE_ADDR RGN_BASE(RGN_GATE)
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27#define KERNEL_START (GATE_ADDR+__IA64_UL_CONST(0x100000000))
28#define PERCPU_ADDR (-PERCPU_PAGE_SIZE)
29#define LOAD_OFFSET (KERNEL_START - KERNEL_TR_PAGE_SIZE)
30
31#ifndef __ASSEMBLY__
32
33#include <linux/kernel.h>
34#include <linux/types.h>
35
36#define AT_VECTOR_SIZE_ARCH 2
37
38struct pci_vector_struct {
39 __u16 segment;
40 __u16 bus;
41 __u32 pci_id;
42 __u8 pin;
43 __u32 irq;
44};
45
46extern struct ia64_boot_param {
47 __u64 command_line;
48 __u64 efi_systab;
49 __u64 efi_memmap;
50 __u64 efi_memmap_size;
51 __u64 efi_memdesc_size;
52 __u32 efi_memdesc_version;
53 struct {
54 __u16 num_cols;
55 __u16 num_rows;
56 __u16 orig_x;
57 __u16 orig_y;
58 } console_info;
59 __u64 fpswa;
60 __u64 initrd_start;
61 __u64 initrd_size;
62} *ia64_boot_param;
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86#define mb() ia64_mf()
87#define rmb() mb()
88#define wmb() mb()
89#define read_barrier_depends() do { } while(0)
90
91#ifdef CONFIG_SMP
92# define smp_mb() mb()
93# define smp_rmb() rmb()
94# define smp_wmb() wmb()
95# define smp_read_barrier_depends() read_barrier_depends()
96#else
97# define smp_mb() barrier()
98# define smp_rmb() barrier()
99# define smp_wmb() barrier()
100# define smp_read_barrier_depends() do { } while(0)
101#endif
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108#define set_mb(var, value) do { (var) = (value); mb(); } while (0)
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115
116#ifdef __KERNEL__
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128extern struct task_struct *ia64_switch_to (void *next_task);
129
130struct task_struct;
131
132extern void ia64_save_extra (struct task_struct *task);
133extern void ia64_load_extra (struct task_struct *task);
134
135#ifdef CONFIG_VIRT_CPU_ACCOUNTING
136extern void ia64_account_on_switch (struct task_struct *prev, struct task_struct *next);
137# define IA64_ACCOUNT_ON_SWITCH(p,n) ia64_account_on_switch(p,n)
138#else
139# define IA64_ACCOUNT_ON_SWITCH(p,n)
140#endif
141
142#ifdef CONFIG_PERFMON
143 DECLARE_PER_CPU(unsigned long, pfm_syst_info);
144# define PERFMON_IS_SYSWIDE() (__get_cpu_var(pfm_syst_info) & 0x1)
145#else
146# define PERFMON_IS_SYSWIDE() (0)
147#endif
148
149#define IA64_HAS_EXTRA_STATE(t) \
150 ((t)->thread.flags & (IA64_THREAD_DBG_VALID|IA64_THREAD_PM_VALID) \
151 || PERFMON_IS_SYSWIDE())
152
153#define __switch_to(prev,next,last) do { \
154 IA64_ACCOUNT_ON_SWITCH(prev, next); \
155 if (IA64_HAS_EXTRA_STATE(prev)) \
156 ia64_save_extra(prev); \
157 if (IA64_HAS_EXTRA_STATE(next)) \
158 ia64_load_extra(next); \
159 ia64_psr(task_pt_regs(next))->dfh = !ia64_is_local_fpu_owner(next); \
160 (last) = ia64_switch_to((next)); \
161} while (0)
162
163#ifdef CONFIG_SMP
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170# define switch_to(prev,next,last) do { \
171 if (ia64_psr(task_pt_regs(prev))->mfh && ia64_is_local_fpu_owner(prev)) { \
172 ia64_psr(task_pt_regs(prev))->mfh = 0; \
173 (prev)->thread.flags |= IA64_THREAD_FPH_VALID; \
174 __ia64_save_fpu((prev)->thread.fph); \
175 } \
176 __switch_to(prev, next, last); \
177 \
178 if (unlikely((current->thread.flags & IA64_THREAD_MIGRATION) && \
179 (task_cpu(current) != \
180 task_thread_info(current)->last_cpu))) { \
181 platform_migrate(current); \
182 task_thread_info(current)->last_cpu = task_cpu(current); \
183 } \
184} while (0)
185#else
186# define switch_to(prev,next,last) __switch_to(prev, next, last)
187#endif
188
189#define __ARCH_WANT_UNLOCKED_CTXSW
190#define ARCH_HAS_PREFETCH_SWITCH_STACK
191#define ia64_platform_is(x) (strcmp(x, platform_name) == 0)
192
193void cpu_idle_wait(void);
194
195#define arch_align_stack(x) (x)
196
197void default_idle(void);
198
199#endif
200
201#endif
202
203#endif
204