diff options
Diffstat (limited to 'arch/mips/kernel/entry.S')
| -rw-r--r-- | arch/mips/kernel/entry.S | 69 |
1 files changed, 46 insertions, 23 deletions
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S index 83c87fe4ee4..d101d2fb24c 100644 --- a/arch/mips/kernel/entry.S +++ b/arch/mips/kernel/entry.S @@ -17,6 +17,9 @@ #include <asm/isadep.h> #include <asm/thread_info.h> #include <asm/war.h> +#ifdef CONFIG_MIPS_MT_SMTC +#include <asm/mipsmtregs.h> +#endif #ifdef CONFIG_PREEMPT .macro preempt_stop @@ -75,6 +78,37 @@ FEXPORT(syscall_exit) bnez t0, syscall_exit_work FEXPORT(restore_all) # restore full frame +#ifdef CONFIG_MIPS_MT_SMTC +/* Detect and execute deferred IPI "interrupts" */ + move a0,sp + jal deferred_smtc_ipi +/* Re-arm any temporarily masked interrupts not explicitly "acked" */ + mfc0 v0, CP0_TCSTATUS + ori v1, v0, TCSTATUS_IXMT + mtc0 v1, CP0_TCSTATUS + andi v0, TCSTATUS_IXMT + ehb + mfc0 t0, CP0_TCCONTEXT + DMT 9 # dmt t1 + jal mips_ihb + mfc0 t2, CP0_STATUS + andi t3, t0, 0xff00 + or t2, t2, t3 + mtc0 t2, CP0_STATUS + ehb + andi t1, t1, VPECONTROL_TE + beqz t1, 1f + EMT +1: + mfc0 v1, CP0_TCSTATUS + /* We set IXMT above, XOR should cler it here */ + xori v1, v1, TCSTATUS_IXMT + or v1, v0, v1 + mtc0 v1, CP0_TCSTATUS + ehb + xor t0, t0, t3 + mtc0 t0, CP0_TCCONTEXT +#endif /* CONFIG_MIPS_MT_SMTC */ .set noat RESTORE_TEMP RESTORE_AT @@ -120,28 +154,17 @@ syscall_exit_work: jal do_syscall_trace b resume_userspace +#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT) + /* - * Common spurious interrupt handler. + * MIPS32R2 Instruction Hazard Barrier - must be called + * + * For C code use the inline version named instruction_hazard(). */ -LEAF(spurious_interrupt) - /* - * Someone tried to fool us by sending an interrupt but we - * couldn't find a cause for it. - */ - PTR_LA t1, irq_err_count -#ifdef CONFIG_SMP -1: ll t0, (t1) - addiu t0, 1 - sc t0, (t1) -#if R10000_LLSC_WAR - beqzl t0, 1b -#else - beqz t0, 1b -#endif -#else - lw t0, (t1) - addiu t0, 1 - sw t0, (t1) -#endif - j ret_from_irq - END(spurious_interrupt) +LEAF(mips_ihb) + .set mips32r2 + jr.hb ra + nop + END(mips_ihb) + +#endif /* CONFIG_CPU_MIPSR2 or CONFIG_MIPS_MT */ |