1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* hvtramp.S: Hypervisor start-cpu trampoline code.
4 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
8 #include <asm/thread_info.h>
9 #include <asm/hypervisor.h>
10 #include <asm/scratchpad.h>
11 #include <asm/spitfire.h>
12 #include <asm/hvtramp.h>
13 #include <asm/pstate.h>
14 #include <asm/ptrace.h>
20 .globl hv_cpu_startup, hv_cpu_startup_end
22 /* This code executes directly out of the hypervisor
23 * with physical addressing (va==pa). %o0 contains
24 * our client argument which for Linux points to
25 * a descriptor data structure which defines the
26 * MMU entries we need to load up.
28 * After we set things up we enable the MMU and call
31 * First setup basic privileged cpu state.
35 wrpr %g0, PIL_NORMAL_MAX, %pil
36 wrpr %g0, 0, %canrestore
37 wrpr %g0, 0, %otherwin
39 wrpr %g0, 6, %cleanwin
44 sethi %hi(sparc64_ttable_tl0), %g1
49 lduw [%l0 + HVTRAMP_DESCR_CPU], %g1
50 mov SCRATCHPAD_CPUID, %g2
51 stxa %g1, [%g2] ASI_SCRATCHPAD
53 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_VA], %g2
54 stxa %g2, [%g0] ASI_SCRATCHPAD
57 lduw [%l0 + HVTRAMP_DESCR_NUM_MAPPINGS], %l2
58 add %l0, HVTRAMP_DESCR_MAPS, %l3
60 1: ldx [%l3 + HVTRAMP_MAPPING_VADDR], %o0
62 ldx [%l3 + HVTRAMP_MAPPING_TTE], %o2
63 mov HV_MMU_IMMU | HV_MMU_DMMU, %o3
64 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
73 add %l3, HVTRAMP_MAPPING_SIZE, %l3
75 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_PA], %o0
76 mov HV_FAST_MMU_FAULT_AREA_CONF, %o5
82 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
84 ldx [%l0 + HVTRAMP_DESCR_THREAD_REG], %l6
88 mov HV_FAST_MMU_ENABLE, %o5
98 mov PRIMARY_CONTEXT, %g7
99 stxa %g0, [%g7] ASI_MMU
102 mov SECONDARY_CONTEXT, %g7
103 stxa %g0, [%g7] ASI_MMU
107 ldx [%g6 + TI_TASK], %g4
110 sllx %g5, THREAD_SHIFT, %g5
111 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
114 call init_irqwork_curcpu
116 call hard_smp_processor_id
119 call sun4v_register_mondo_queues
122 call init_cur_cpu_trap
125 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate