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1276 |
phoenix |
#ifndef __ASM_SH64_SYSTEM_H
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#define __ASM_SH64_SYSTEM_H
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* include/asm-sh64/system.h
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*
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* Copyright (C) 2000, 2001 Paolo Alberelli
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* Copyright (C) 2003 Paul Mundt
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*
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*/
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#include <linux/config.h>
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#include <asm/registers.h>
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/*
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* switch_to() should switch tasks to task nr n, first
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*/
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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#ifdef CONFIG_SMP
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#error "no SMP SH64"
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#else
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#define prepare_to_switch() do { } while(0)
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#ifndef CS_SAVE_ALL
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#define SAVE_CALLER_SAVED
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#define RESTORE_CALLER_SAVED
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#else
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#define SAVE_CALLER_SAVED \
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__asm__ __volatile__("addi.l r15, -256, r15\n\t" \
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"st.q r15, 0, r0\n\t" \
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"st.q r15, 8, r1\n\t" \
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"st.q r15, 16, r2\n\t" \
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"st.q r15, 24, r3\n\t" \
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"st.q r15, 32, r4\n\t" \
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"st.q r15, 40, r5\n\t" \
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"st.q r15, 48, r6\n\t" \
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"st.q r15, 56, r7\n\t" \
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"st.q r15, 64, r8\n\t" \
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"st.q r15, 72, r9\n\t" \
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"st.q r15, 80, r17\n\t" \
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"st.q r15, 88, r19\n\t" \
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"st.q r15, 96, r20\n\t" \
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"st.q r15, 104, r21\n\t" \
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"st.q r15, 112, r22\n\t" \
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"st.q r15, 120, r23\n\t" \
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"st.q r15, 128, r36\n\t" \
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"st.q r15, 136, r37\n\t" \
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"st.q r15, 144, r38\n\t" \
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"st.q r15, 152, r39\n\t" \
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"st.q r15, 160, r40\n\t" \
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"st.q r15, 168, r41\n\t" \
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"st.q r15, 176, r42\n\t" \
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"st.q r15, 184, r43\n\t" \
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"st.q r15, 192, r60\n\t" \
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"st.q r15, 200, r61\n\t" \
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"st.q r15, 208, r62\n\t" \
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"gettr " __t0 ", r0\n\t" \
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"st.q r15, 216, r0\n\t" \
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"gettr " __t1 ", r1\n\t" \
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"st.q r15, 224, r1\n\t" \
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"gettr " __t2 ", r2\n\t" \
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"st.q r15, 232, r2\n\t" \
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"gettr " __t3 ", r3\n\t" \
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"st.q r15, 240, r3\n\t" \
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"gettr " __t4 ", r4\n\t" \
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"st.q r15, 248, r4\n\t");
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/* Note. Do not restore r42 ! */
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#define RESTORE_CALLER_SAVED \
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__asm__ __volatile__("ld.q r15, 216, r0\n\t" \
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"ptabs r0, " __t0 "\n\t" \
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"ld.q r15, 224, r1\n\t" \
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"ptabs r1, " __t1 "\n\t" \
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"ld.q r15, 232, r2\n\t" \
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"ptabs r2, " __t2 "\n\t" \
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"ld.q r15, 240, r3\n\t" \
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"ptabs r3, " __t3 "\n\t" \
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"ld.q r15, 248, r4\n\t" \
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"ptabs r4, " __t4 "\n\t" \
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"ld.q r15, 0, r0\n\t" \
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"ld.q r15, 8, r1\n\t" \
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"ld.q r15, 16, r2\n\t" \
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"ld.q r15, 24, r3\n\t" \
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"ld.q r15, 32, r4\n\t" \
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"ld.q r15, 40, r5\n\t" \
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"ld.q r15, 48, r6\n\t" \
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"ld.q r15, 56, r7\n\t" \
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"ld.q r15, 64, r8\n\t" \
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"ld.q r15, 72, r9\n\t" \
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"ld.q r15, 80, r17\n\t" \
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"ld.q r15, 88, r19\n\t" \
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"ld.q r15, 96, r20\n\t" \
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"ld.q r15, 104, r21\n\t" \
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"ld.q r15, 112, r22\n\t" \
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"ld.q r15, 120, r23\n\t" \
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"ld.q r15, 128, r36\n\t" \
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"ld.q r15, 136, r37\n\t" \
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"ld.q r15, 144, r38\n\t" \
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"ld.q r15, 152, r39\n\t" \
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"ld.q r15, 160, r40\n\t" \
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"ld.q r15, 168, r41\n\t" \
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"ld.q r15, 184, r43\n\t" \
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"ld.q r15, 192, r60\n\t" \
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"ld.q r15, 200, r61\n\t" \
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"ld.q r15, 208, r62\n\t" \
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"addi.l r15, 256, r15\n\t");
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#endif
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#define switch_to(prev,next,last) do { \
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register unsigned long * r36 __asm__ ("r36"); \
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register unsigned long * r37 __asm__ ("r37"); \
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register unsigned long long r38 __asm__ ("r38"); \
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register unsigned long long r39 __asm__ ("r39"); \
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register unsigned long * r40 __asm__ ("r40"); \
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register unsigned long * r41 __asm__ ("r41"); \
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register struct task_struct * r42 __asm__ ("r42"); \
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\
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/* printk("switch_to prev %08x next %08x last %08x\n", prev, next,last); */ \
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if (last_task_used_math != next) { \
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struct pt_regs* regs; \
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regs = next->thread.kregs; \
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regs->sr |= SR_FD; \
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} \
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\
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SAVE_CALLER_SAVED \
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\
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r36 = &prev->thread.sp; \
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r37 = &prev->thread.pc; \
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\
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/* Note that we always are in kernel space */ \
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r38 = next->thread.sp | NEFF_MASK; \
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r39 = next->thread.pc | NEFF_MASK; \
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\
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r40 = (unsigned long *) prev; \
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r41 = (unsigned long *) next; \
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\
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__asm__ __volatile__("addi.l r15, -304, r15\n\t" \
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"st.q r15, 0, r10\n\t" \
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"st.q r15, 8, r11\n\t" \
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"st.q r15, 16, r12\n\t" \
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"st.q r15, 24, r13\n\t" \
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"st.q r15, 32, r14\n\t" \
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"st.q r15, 40, r16\n\t" \
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"st.q r15, 48, r18\n\t" \
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"st.q r15, 56, r24\n\t" \
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"st.q r15, 64, r25\n\t" \
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"st.q r15, 72, r26\n\t" \
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"st.q r15, 80, r27\n\t" \
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"st.q r15, 88, r28\n\t" \
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"st.q r15, 96, r29\n\t" \
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"st.q r15, 104, r30\n\t" \
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| 159 |
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"st.q r15, 112, r31\n\t" \
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| 160 |
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"st.q r15, 120, r32\n\t" \
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"st.q r15, 128, r33\n\t" \
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"st.q r15, 136, r34\n\t" \
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"st.q r15, 144, r35\n\t" \
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"st.q r15, 152, r44\n\t" \
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"st.q r15, 160, r45\n\t" \
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"st.q r15, 168, r46\n\t" \
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"st.q r15, 176, r47\n\t" \
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"st.q r15, 184, r48\n\t" \
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| 169 |
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"st.q r15, 192, r49\n\t" \
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| 170 |
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"st.q r15, 200, r50\n\t" \
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| 171 |
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"st.q r15, 208, r51\n\t" \
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| 172 |
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"st.q r15, 216, r52\n\t" \
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| 173 |
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"st.q r15, 224, r53\n\t" \
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| 174 |
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"st.q r15, 232, r54\n\t" \
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| 175 |
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"st.q r15, 240, r55\n\t" \
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| 176 |
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"st.q r15, 248, r56\n\t" \
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| 177 |
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"st.q r15, 256, r57\n\t" \
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| 178 |
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"st.q r15, 264, r58\n\t" \
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"st.q r15, 272, r59\n\t" \
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| 180 |
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"gettr " __t5 ", r55\n\t" \
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"st.q r15, 280, r55\n\t" \
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| 182 |
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"gettr " __t6 ", r56\n\t" \
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"st.q r15, 288, r56\n\t" \
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| 184 |
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"gettr " __t7 ", r57\n\t" \
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"st.q r15, 296, r57\n\t" \
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"_loada __switch_to, r18\n\t" \
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"ptabs r18, " __t5 "\n\t" \
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| 188 |
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"_pta 36, " __t6 "\n\t" \
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"gettr " __t6 ", r18\n\t" \
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| 190 |
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"st.l %1, 0, r15\n\t" \
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| 191 |
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"st.l %2, 0, r18\n\t" \
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| 192 |
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"or %3, r63, r15\n\t" \
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| 193 |
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"or %4, r63, r18\n\t" \
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| 194 |
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"or %5, r63, r2\n\t" \
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| 195 |
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"or %6, r63, r3\n\t" \
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| 196 |
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"blink " __t5 ", r63\n\t" \
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| 197 |
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"or r2, r63, %0\n\t" \
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| 198 |
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"ld.q r15, 280, r55\n\t" \
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| 199 |
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"ptabs r55, " __t5 "\n\t" \
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| 200 |
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"ld.q r15, 288, r56\n\t" \
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| 201 |
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"ptabs r56, " __t6 "\n\t" \
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| 202 |
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"ld.q r15, 296, r57\n\t" \
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| 203 |
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"ptabs r57, " __t7 "\n\t" \
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| 204 |
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"ld.q r15, 0, r10\n\t" \
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| 205 |
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"ld.q r15, 8, r11\n\t" \
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| 206 |
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"ld.q r15, 16, r12\n\t" \
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| 207 |
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"ld.q r15, 24, r13\n\t" \
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| 208 |
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"ld.q r15, 32, r14\n\t" \
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| 209 |
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"ld.q r15, 40, r16\n\t" \
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| 210 |
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"ld.q r15, 48, r18\n\t" \
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| 211 |
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"ld.q r15, 56, r24\n\t" \
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| 212 |
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"ld.q r15, 64, r25\n\t" \
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| 213 |
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"ld.q r15, 72, r26\n\t" \
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| 214 |
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"ld.q r15, 80, r27\n\t" \
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| 215 |
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"ld.q r15, 88, r28\n\t" \
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| 216 |
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"ld.q r15, 96, r29\n\t" \
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| 217 |
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"ld.q r15, 104, r30\n\t" \
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| 218 |
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"ld.q r15, 112, r31\n\t" \
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| 219 |
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"ld.q r15, 120, r32\n\t" \
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| 220 |
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"ld.q r15, 128, r33\n\t" \
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| 221 |
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"ld.q r15, 136, r34\n\t" \
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| 222 |
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"ld.q r15, 144, r35\n\t" \
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| 223 |
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"ld.q r15, 152, r44\n\t" \
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| 224 |
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"ld.q r15, 160, r45\n\t" \
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| 225 |
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"ld.q r15, 168, r46\n\t" \
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| 226 |
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"ld.q r15, 176, r47\n\t" \
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| 227 |
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"ld.q r15, 184, r48\n\t" \
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| 228 |
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"ld.q r15, 192, r49\n\t" \
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| 229 |
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"ld.q r15, 200, r50\n\t" \
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| 230 |
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"ld.q r15, 208, r51\n\t" \
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| 231 |
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"ld.q r15, 216, r52\n\t" \
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| 232 |
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"ld.q r15, 224, r53\n\t" \
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| 233 |
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"ld.q r15, 232, r54\n\t" \
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| 234 |
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"ld.q r15, 240, r55\n\t" \
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| 235 |
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"ld.q r15, 248, r56\n\t" \
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| 236 |
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"ld.q r15, 256, r57\n\t" \
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| 237 |
|
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"ld.q r15, 264, r58\n\t" \
|
| 238 |
|
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"ld.q r15, 272, r59\n\t" \
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| 239 |
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"addi.l r15, 304, r15\n\t" \
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| 240 |
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: "=r" (r42) \
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| 241 |
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: "r" (r36), "r" (r37), "r" (r38), \
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| 242 |
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"r" (r39), "r" (r40), "r" (r41)); \
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| 243 |
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RESTORE_CALLER_SAVED \
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| 244 |
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last = r42; \
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| 245 |
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} while (0)
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| 246 |
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#endif
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| 247 |
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|
|
| 248 |
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#define nop() __asm__ __volatile__ ("nop")
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| 249 |
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|
|
| 250 |
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#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
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| 251 |
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| 252 |
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#define tas(ptr) (xchg((ptr), 1))
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| 253 |
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| 254 |
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extern void __xchg_called_with_bad_pointer(void);
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| 255 |
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| 256 |
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#define mb() __asm__ __volatile__ ("synco": : :"memory")
|
| 257 |
|
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#define rmb() mb()
|
| 258 |
|
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#define wmb() __asm__ __volatile__ ("synco": : :"memory")
|
| 259 |
|
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#define set_rmb(var, value) do { xchg(&var, value); } while (0)
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| 260 |
|
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#define set_mb(var, value) set_rmb(var, value)
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| 261 |
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#define set_wmb(var, value) do { var = value; wmb(); } while (0)
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| 262 |
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| 263 |
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/* Interrupt Control */
|
| 264 |
|
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#ifndef HARD_CLI
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| 265 |
|
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#define SR_MASK_L 0x000000f0L
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| 266 |
|
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#define SR_MASK_LL 0x00000000000000f0LL
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| 267 |
|
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#else
|
| 268 |
|
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#define SR_MASK_L 0x10000000L
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| 269 |
|
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#define SR_MASK_LL 0x0000000010000000LL
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| 270 |
|
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#endif
|
| 271 |
|
|
|
| 272 |
|
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extern __inline__ void __sti(void)
|
| 273 |
|
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{
|
| 274 |
|
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/* cli/sti based on SR.BL */
|
| 275 |
|
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unsigned long long __dummy0, __dummy1=~SR_MASK_LL;
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| 276 |
|
|
|
| 277 |
|
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__asm__ __volatile__("getcon " __c0 ", %0\n\t"
|
| 278 |
|
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"and %0, %1, %0\n\t"
|
| 279 |
|
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"putcon %0, " __c0 "\n\t"
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| 280 |
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: "=&r" (__dummy0)
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| 281 |
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: "r" (__dummy1));
|
| 282 |
|
|
}
|
| 283 |
|
|
|
| 284 |
|
|
extern __inline__ void __cli(void)
|
| 285 |
|
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{
|
| 286 |
|
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/* cli/sti based on SR.BL */
|
| 287 |
|
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unsigned long long __dummy0, __dummy1=SR_MASK_LL;
|
| 288 |
|
|
__asm__ __volatile__("getcon " __c0 ", %0\n\t"
|
| 289 |
|
|
"or %0, %1, %0\n\t"
|
| 290 |
|
|
"putcon %0, " __c0 "\n\t"
|
| 291 |
|
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: "=&r" (__dummy0)
|
| 292 |
|
|
: "r" (__dummy1));
|
| 293 |
|
|
}
|
| 294 |
|
|
|
| 295 |
|
|
#define __save_flags(x) \
|
| 296 |
|
|
(__extension__ ({ unsigned long long __dummy=SR_MASK_LL; \
|
| 297 |
|
|
__asm__ __volatile__( \
|
| 298 |
|
|
"getcon " __c0 ", %0\n\t" \
|
| 299 |
|
|
"and %0, %1, %0" \
|
| 300 |
|
|
: "=&r" (x) \
|
| 301 |
|
|
: "r" (__dummy));}))
|
| 302 |
|
|
|
| 303 |
|
|
#define __save_and_cli(x) \
|
| 304 |
|
|
(__extension__ ({ unsigned long long __d2=SR_MASK_LL, __d1; \
|
| 305 |
|
|
__asm__ __volatile__( \
|
| 306 |
|
|
"getcon " __c0 ", %1\n\t" \
|
| 307 |
|
|
"or %1, r63, %0\n\t" \
|
| 308 |
|
|
"or %1, %2, %1\n\t" \
|
| 309 |
|
|
"putcon %1, " __c0 "\n\t" \
|
| 310 |
|
|
"and %0, %2, %0" \
|
| 311 |
|
|
: "=&r" (x), "=&r" (__d1) \
|
| 312 |
|
|
: "r" (__d2));}));
|
| 313 |
|
|
|
| 314 |
|
|
#define __restore_flags(x) do { \
|
| 315 |
|
|
if ( ((x) & SR_MASK_L) == 0 ) /* dropping to 0 ? */ \
|
| 316 |
|
|
__sti(); /* yes...re-enable */ \
|
| 317 |
|
|
} while (0)
|
| 318 |
|
|
|
| 319 |
|
|
#define __save_and_sti(x) do { __save_flags(x); __sti(); } while (0)
|
| 320 |
|
|
|
| 321 |
|
|
/* For spinlocks etc */
|
| 322 |
|
|
#define local_irq_save(x) __save_and_cli(x)
|
| 323 |
|
|
#define local_irq_set(x) __save_and_sti(x)
|
| 324 |
|
|
#define local_irq_restore(x) __restore_flags(x)
|
| 325 |
|
|
#define local_irq_disable() __cli()
|
| 326 |
|
|
#define local_irq_enable() __sti()
|
| 327 |
|
|
|
| 328 |
|
|
#ifdef CONFIG_SMP
|
| 329 |
|
|
|
| 330 |
|
|
extern void __global_cli(void);
|
| 331 |
|
|
extern void __global_sti(void);
|
| 332 |
|
|
extern unsigned long __global_save_flags(void);
|
| 333 |
|
|
extern void __global_restore_flags(unsigned long);
|
| 334 |
|
|
#define cli() __global_cli()
|
| 335 |
|
|
#define sti() __global_sti()
|
| 336 |
|
|
#define save_flags(x) ((x)=__global_save_flags())
|
| 337 |
|
|
#define restore_flags(x) __global_restore_flags(x)
|
| 338 |
|
|
#define save_and_sti(x) do { save_flags(x); sti(x); } while (0)
|
| 339 |
|
|
|
| 340 |
|
|
#else
|
| 341 |
|
|
|
| 342 |
|
|
#define cli() __cli()
|
| 343 |
|
|
#define sti() __sti()
|
| 344 |
|
|
#define save_flags(x) __save_flags(x)
|
| 345 |
|
|
#define save_and_cli(x) __save_and_cli(x)
|
| 346 |
|
|
#define restore_flags(x) __restore_flags(x)
|
| 347 |
|
|
#define save_and_sti(x) __save_and_sti(x)
|
| 348 |
|
|
|
| 349 |
|
|
#endif
|
| 350 |
|
|
|
| 351 |
|
|
extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)
|
| 352 |
|
|
{
|
| 353 |
|
|
unsigned long flags, retval;
|
| 354 |
|
|
|
| 355 |
|
|
save_and_cli(flags);
|
| 356 |
|
|
retval = *m;
|
| 357 |
|
|
*m = val;
|
| 358 |
|
|
restore_flags(flags);
|
| 359 |
|
|
return retval;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
extern __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
|
| 363 |
|
|
{
|
| 364 |
|
|
unsigned long flags, retval;
|
| 365 |
|
|
|
| 366 |
|
|
save_and_cli(flags);
|
| 367 |
|
|
retval = *m;
|
| 368 |
|
|
*m = val & 0xff;
|
| 369 |
|
|
restore_flags(flags);
|
| 370 |
|
|
return retval;
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
|
| 374 |
|
|
{
|
| 375 |
|
|
switch (size) {
|
| 376 |
|
|
case 4:
|
| 377 |
|
|
return xchg_u32(ptr, x);
|
| 378 |
|
|
break;
|
| 379 |
|
|
case 1:
|
| 380 |
|
|
return xchg_u8(ptr, x);
|
| 381 |
|
|
break;
|
| 382 |
|
|
}
|
| 383 |
|
|
__xchg_called_with_bad_pointer();
|
| 384 |
|
|
return x;
|
| 385 |
|
|
}
|
| 386 |
|
|
|
| 387 |
|
|
/* XXX
|
| 388 |
|
|
* disable hlt during certain critical i/o operations
|
| 389 |
|
|
*/
|
| 390 |
|
|
#define HAVE_DISABLE_HLT
|
| 391 |
|
|
void disable_hlt(void);
|
| 392 |
|
|
void enable_hlt(void);
|
| 393 |
|
|
|
| 394 |
|
|
|
| 395 |
|
|
#define smp_mb() barrier()
|
| 396 |
|
|
#define smp_rmb() barrier()
|
| 397 |
|
|
#define smp_wmb() barrier()
|
| 398 |
|
|
|
| 399 |
|
|
extern void print_seg(char *file,int line);
|
| 400 |
|
|
|
| 401 |
|
|
#define PLS() print_seg(__FILE__,__LINE__)
|
| 402 |
|
|
|
| 403 |
|
|
#define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__)
|
| 404 |
|
|
|
| 405 |
|
|
#endif /* __ASM_SH64_SYSTEM_H */
|
