提交 a5cb2366 编写于 作者: L Linus Torvalds

Merge tag 'nios2-fixes-v3.19-rc3' of git://git.rocketboards.org/linux-socfpga-next

Pull arch/nios2 fixes from Ley Foon Tan:

 - fix compilation error when enable CONFIG_PREEMPT

 - initialize cpuinfo.mmu variable supplied by the device tree

* tag 'nios2-fixes-v3.19-rc3' of git://git.rocketboards.org/linux-socfpga-next:
  nios2: Use preempt_schedule_irq
  nios2: Initialize cpuinfo.mmu
...@@ -72,6 +72,7 @@ void __init setup_cpuinfo(void) ...@@ -72,6 +72,7 @@ void __init setup_cpuinfo(void)
cpuinfo.has_div = fcpu_has(cpu, "altr,has-div"); cpuinfo.has_div = fcpu_has(cpu, "altr,has-div");
cpuinfo.has_mul = fcpu_has(cpu, "altr,has-mul"); cpuinfo.has_mul = fcpu_has(cpu, "altr,has-mul");
cpuinfo.has_mulx = fcpu_has(cpu, "altr,has-mulx"); cpuinfo.has_mulx = fcpu_has(cpu, "altr,has-mulx");
cpuinfo.mmu = fcpu_has(cpu, "altr,has-mmu");
if (IS_ENABLED(CONFIG_NIOS2_HW_DIV_SUPPORT) && !cpuinfo.has_div) if (IS_ENABLED(CONFIG_NIOS2_HW_DIV_SUPPORT) && !cpuinfo.has_div)
err_cpu("DIV"); err_cpu("DIV");
......
...@@ -365,30 +365,14 @@ ENTRY(ret_from_interrupt) ...@@ -365,30 +365,14 @@ ENTRY(ret_from_interrupt)
GET_THREAD_INFO r1 GET_THREAD_INFO r1
ldw r4, TI_PREEMPT_COUNT(r1) ldw r4, TI_PREEMPT_COUNT(r1)
bne r4, r0, restore_all bne r4, r0, restore_all
need_resched:
ldw r4, TI_FLAGS(r1) /* ? Need resched set */ ldw r4, TI_FLAGS(r1) /* ? Need resched set */
BTBZ r10, r4, TIF_NEED_RESCHED, restore_all BTBZ r10, r4, TIF_NEED_RESCHED, restore_all
ldw r4, PT_ESTATUS(sp) /* ? Interrupts off */ ldw r4, PT_ESTATUS(sp) /* ? Interrupts off */
andi r10, r4, ESTATUS_EPIE andi r10, r4, ESTATUS_EPIE
beq r10, r0, restore_all beq r10, r0, restore_all
movia r4, PREEMPT_ACTIVE call preempt_schedule_irq
stw r4, TI_PREEMPT_COUNT(r1)
rdctl r10, status /* enable intrs again */
ori r10, r10 ,STATUS_PIE
wrctl status, r10
PUSH r1
call schedule
POP r1
mov r4, r0
stw r4, TI_PREEMPT_COUNT(r1)
rdctl r10, status /* disable intrs */
andi r10, r10, %lo(~STATUS_PIE)
wrctl status, r10
br need_resched
#else
br restore_all
#endif #endif
br restore_all
/*********************************************************************** /***********************************************************************
* A few syscall wrappers * A few syscall wrappers
......
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