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https://github.com/edk2-porting/linux-next.git
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a88b5ba8bd
o Move all files from sparc64/kernel/ to sparc/kernel - rename as appropriate o Update sparc/Makefile to the changes o Update sparc/kernel/Makefile to include the sparc64 files NOTE: This commit changes link order on sparc64! Link order had to change for either of sparc32 and sparc64. And assuming sparc64 see more testing than sparc32 change link order on sparc64 where issues will be caught faster. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
141 lines
2.7 KiB
ArmAsm
141 lines
2.7 KiB
ArmAsm
/* hvtramp.S: Hypervisor start-cpu trampoline code.
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*
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* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/init.h>
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#include <asm/thread_info.h>
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#include <asm/hypervisor.h>
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#include <asm/scratchpad.h>
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#include <asm/spitfire.h>
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#include <asm/hvtramp.h>
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#include <asm/pstate.h>
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#include <asm/ptrace.h>
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#include <asm/head.h>
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#include <asm/asi.h>
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#include <asm/pil.h>
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__CPUINIT
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.align 8
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.globl hv_cpu_startup, hv_cpu_startup_end
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/* This code executes directly out of the hypervisor
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* with physical addressing (va==pa). %o0 contains
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* our client argument which for Linux points to
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* a descriptor data structure which defines the
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* MMU entries we need to load up.
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*
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* After we set things up we enable the MMU and call
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* into the kernel.
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*
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* First setup basic privileged cpu state.
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*/
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hv_cpu_startup:
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SET_GL(0)
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wrpr %g0, PIL_NORMAL_MAX, %pil
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wrpr %g0, 0, %canrestore
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wrpr %g0, 0, %otherwin
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wrpr %g0, 6, %cansave
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wrpr %g0, 6, %cleanwin
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wrpr %g0, 0, %cwp
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wrpr %g0, 0, %wstate
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wrpr %g0, 0, %tl
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sethi %hi(sparc64_ttable_tl0), %g1
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wrpr %g1, %tba
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mov %o0, %l0
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lduw [%l0 + HVTRAMP_DESCR_CPU], %g1
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mov SCRATCHPAD_CPUID, %g2
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stxa %g1, [%g2] ASI_SCRATCHPAD
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ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_VA], %g2
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stxa %g2, [%g0] ASI_SCRATCHPAD
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mov 0, %l1
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lduw [%l0 + HVTRAMP_DESCR_NUM_MAPPINGS], %l2
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add %l0, HVTRAMP_DESCR_MAPS, %l3
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1: ldx [%l3 + HVTRAMP_MAPPING_VADDR], %o0
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clr %o1
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ldx [%l3 + HVTRAMP_MAPPING_TTE], %o2
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mov HV_MMU_IMMU | HV_MMU_DMMU, %o3
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mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
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ta HV_FAST_TRAP
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brnz,pn %o0, 80f
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nop
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add %l1, 1, %l1
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cmp %l1, %l2
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blt,a,pt %xcc, 1b
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add %l3, HVTRAMP_MAPPING_SIZE, %l3
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ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_PA], %o0
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mov HV_FAST_MMU_FAULT_AREA_CONF, %o5
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ta HV_FAST_TRAP
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brnz,pn %o0, 80f
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nop
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wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
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ldx [%l0 + HVTRAMP_DESCR_THREAD_REG], %l6
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mov 1, %o0
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set 1f, %o1
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mov HV_FAST_MMU_ENABLE, %o5
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ta HV_FAST_TRAP
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ba,pt %xcc, 80f
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nop
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1:
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wr %g0, 0, %fprs
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wr %g0, ASI_P, %asi
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mov PRIMARY_CONTEXT, %g7
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stxa %g0, [%g7] ASI_MMU
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membar #Sync
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mov SECONDARY_CONTEXT, %g7
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stxa %g0, [%g7] ASI_MMU
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membar #Sync
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mov %l6, %g6
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ldx [%g6 + TI_TASK], %g4
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mov 1, %g5
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sllx %g5, THREAD_SHIFT, %g5
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sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
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add %g6, %g5, %sp
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mov 0, %fp
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call init_irqwork_curcpu
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nop
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call hard_smp_processor_id
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nop
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call sun4v_register_mondo_queues
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nop
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call init_cur_cpu_trap
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mov %g6, %o0
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wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate
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call smp_callin
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nop
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call cpu_idle
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mov 0, %o0
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call cpu_panic
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nop
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80: ba,pt %xcc, 80b
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nop
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.align 8
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hv_cpu_startup_end:
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