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Diffstat (limited to 'include/asm-arm26/assembler.h')
| -rw-r--r-- | include/asm-arm26/assembler.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/include/asm-arm26/assembler.h b/include/asm-arm26/assembler.h new file mode 100644 index 00000000000..83f9aec55e4 --- /dev/null +++ b/include/asm-arm26/assembler.h @@ -0,0 +1,106 @@ +/* + * linux/asm/assembler.h + * + * This file contains arm architecture specific defines + * for the different processors. + * + * Do not include any C declarations in this file - it is included by + * assembler source. + */ +#ifndef __ASSEMBLY__ +#error "Only include this from assembly code" +#endif + +/* + * Endian independent macros for shifting bytes within registers. + */ +#define pull lsr +#define push lsl +#define byte(x) (x*8) + +#ifdef __STDC__ +#define LOADREGS(cond, base, reglist...)\ + ldm##cond base,reglist^ + +#define RETINSTR(instr, regs...)\ + instr##s regs +#else +#define LOADREGS(cond, base, reglist...)\ + ldm/**/cond base,reglist^ + +#define RETINSTR(instr, regs...)\ + instr/**/s regs +#endif + +#define MODENOP\ + mov r0, r0 + +#define MODE(savereg,tmpreg,mode) \ + mov savereg, pc; \ + bic tmpreg, savereg, $0x0c000003; \ + orr tmpreg, tmpreg, $mode; \ + teqp tmpreg, $0 + +#define RESTOREMODE(savereg) \ + teqp savereg, $0 + +#define SAVEIRQS(tmpreg) + +#define RESTOREIRQS(tmpreg) + +#define DISABLEIRQS(tmpreg)\ + teqp pc, $0x08000003 + +#define ENABLEIRQS(tmpreg)\ + teqp pc, $0x00000003 + +#define USERMODE(tmpreg)\ + teqp pc, $0x00000000;\ + mov r0, r0 + +#define SVCMODE(tmpreg)\ + teqp pc, $0x00000003;\ + mov r0, r0 + + +/* + * Save the current IRQ state and disable IRQs + * Note that this macro assumes FIQs are enabled, and + * that the processor is in SVC mode. + */ + .macro save_and_disable_irqs, oldcpsr, temp + mov \oldcpsr, pc + orr \temp, \oldcpsr, #0x08000000 + teqp \temp, #0 + .endm + +/* + * Restore interrupt state previously stored in + * a register + * ** Actually do nothing on Arc - hope that the caller uses a MOVS PC soon + * after! + */ + .macro restore_irqs, oldcpsr + @ This be restore_irqs + .endm + +/* + * These two are used to save LR/restore PC over a user-based access. + * The old 26-bit architecture requires that we save lr (R14) + */ + .macro save_lr + str lr, [sp, #-4]! + .endm + + .macro restore_pc + ldmfd sp!, {pc}^ + .endm + +#define USER(x...) \ +9999: x; \ + .section __ex_table,"a"; \ + .align 3; \ + .long 9999b,9001f; \ + .previous + + |