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134 lines
2.7 KiB
134 lines
2.7 KiB
/*
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* linux/arch/unicore32/mm/proc-ucv2.S
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <asm/hwcap.h>
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#include <asm/pgtable-hwdef.h>
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#include <asm/pgtable.h>
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#include "proc-macros.S"
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ENTRY(cpu_proc_fin)
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stm.w (lr), [sp-]
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mov ip, #PSR_R_BIT | PSR_I_BIT | PRIV_MODE
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mov.a asr, ip
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b.l __cpuc_flush_kern_all
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ldm.w (pc), [sp]+
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/*
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* cpu_reset(loc)
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*
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* Perform a soft reset of the system. Put the CPU into the
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* same state as it would be if it had been reset, and branch
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* to what would be the reset vector.
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*
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* - loc - location to jump to for soft reset
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*/
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.align 5
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ENTRY(cpu_reset)
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mov ip, #0
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movc p0.c5, ip, #28 @ Cache invalidate all
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nop8
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movc p0.c6, ip, #6 @ TLB invalidate all
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nop8
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movc ip, p0.c1, #0 @ ctrl register
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or ip, ip, #0x2000 @ vector base address
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andn ip, ip, #0x000f @ ............idam
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movc p0.c1, ip, #0 @ disable caches and mmu
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nop
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mov pc, r0 @ jump to loc
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nop8
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/*
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* cpu_do_idle()
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*
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* Idle the processor (eg, wait for interrupt).
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*
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* IRQs are already disabled.
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*/
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ENTRY(cpu_do_idle)
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mov r0, #0 @ PCI address
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.rept 8
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ldw r1, [r0]
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.endr
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mov pc, lr
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ENTRY(cpu_dcache_clean_area)
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#ifndef CONFIG_CPU_DCACHE_LINE_DISABLE
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csub.a r1, #MAX_AREA_SIZE
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bsg 101f
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mov r9, #PAGE_SZ
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sub r9, r9, #1 @ PAGE_MASK
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1: va2pa r0, r10, r11, r12, r13 @ r10 is PA
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b 3f
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2: cand.a r0, r9
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beq 1b
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3: movc p0.c5, r10, #11 @ clean D entry
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nop8
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add r0, r0, #CACHE_LINESIZE
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add r10, r10, #CACHE_LINESIZE
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sub.a r1, r1, #CACHE_LINESIZE
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bua 2b
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mov pc, lr
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#endif
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101: mov ip, #0
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movc p0.c5, ip, #10 @ Dcache clean all
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nop8
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mov pc, lr
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/*
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* cpu_do_switch_mm(pgd_phys)
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*
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* Set the translation table base pointer to be pgd_phys
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*
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* - pgd_phys - physical address of new pgd
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*
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* It is assumed that:
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* - we are not using split page tables
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*/
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.align 5
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ENTRY(cpu_do_switch_mm)
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movc p0.c2, r0, #0 @ update page table ptr
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nop8
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movc p0.c6, ip, #6 @ TLB invalidate all
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nop8
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mov pc, lr
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/*
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* cpu_set_pte(ptep, pte)
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*
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* Set a level 2 translation table entry.
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*
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* - ptep - pointer to level 2 translation table entry
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* - pte - PTE value to store
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*/
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.align 5
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ENTRY(cpu_set_pte)
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stw r1, [r0]
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#ifndef CONFIG_CPU_DCACHE_LINE_DISABLE
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sub r2, r0, #PAGE_OFFSET
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movc p0.c5, r2, #11 @ Dcache clean line
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nop8
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#else
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mov ip, #0
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movc p0.c5, ip, #10 @ Dcache clean all
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nop8
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@dcacheline_flush r0, r2, ip
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#endif
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mov pc, lr
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