mirror of
https://github.com/Atmosphere-NX/Atmosphere
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102 lines
6.1 KiB
C
102 lines
6.1 KiB
C
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <mesosphere/arch/arm64/kern_assembly_offsets.h>
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#define ENABLE_FPU(tmp) \
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mrs tmp, cpacr_el1; \
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orr tmp, tmp, #0x300000; \
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msr cpacr_el1, tmp; \
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isb;
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#define GET_THREAD_CONTEXT_AND_RESTORE_FPCR_FPSR(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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add ctx, sp, #(EXCEPTION_CONTEXT_SIZE + THREAD_STACK_PARAMETERS_THREAD_CONTEXT); \
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ldp wtmp1, wtmp2, [ctx, #(THREAD_CONTEXT_FPCR_FPSR)]; \
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msr fpcr, xtmp1; \
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msr fpsr, xtmp2;
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#define RESTORE_FPU64_CALLEE_SAVE_REGISTERS(ctx) \
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ldp q8, q9, [ctx, #(THREAD_CONTEXT_FPU64_Q8_Q9)]; \
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ldp q10, q11, [ctx, #(THREAD_CONTEXT_FPU64_Q10_Q11)]; \
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ldp q12, q13, [ctx, #(THREAD_CONTEXT_FPU64_Q12_Q13)]; \
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ldp q14, q15, [ctx, #(THREAD_CONTEXT_FPU64_Q14_Q15)];
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#define RESTORE_FPU64_CALLER_SAVE_REGISTERS(tmp) \
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ldr tmp, [sp, #(EXCEPTION_CONTEXT_SIZE + THREAD_STACK_PARAMETERS_CALLER_SAVE_FPU_REGISTERS)]; \
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ldp q0, q1, [tmp, #(THREAD_FPU64_CONTEXT_Q0_Q1)]; \
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ldp q2, q3, [tmp, #(THREAD_FPU64_CONTEXT_Q2_Q3)]; \
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ldp q4, q5, [tmp, #(THREAD_FPU64_CONTEXT_Q4_Q5)]; \
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ldp q6, q7, [tmp, #(THREAD_FPU64_CONTEXT_Q6_Q7)]; \
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ldp q16, q17, [tmp, #(THREAD_FPU64_CONTEXT_Q16_Q17)]; \
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ldp q18, q19, [tmp, #(THREAD_FPU64_CONTEXT_Q18_Q19)]; \
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ldp q20, q21, [tmp, #(THREAD_FPU64_CONTEXT_Q20_Q21)]; \
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ldp q22, q23, [tmp, #(THREAD_FPU64_CONTEXT_Q22_Q23)]; \
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ldp q24, q25, [tmp, #(THREAD_FPU64_CONTEXT_Q24_Q25)]; \
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ldp q26, q27, [tmp, #(THREAD_FPU64_CONTEXT_Q26_Q27)]; \
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ldp q28, q29, [tmp, #(THREAD_FPU64_CONTEXT_Q28_Q29)]; \
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ldp q30, q31, [tmp, #(THREAD_FPU64_CONTEXT_Q30_Q31)];
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#define RESTORE_FPU64_ALL_REGISTERS(ctx, tmp) \
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RESTORE_FPU64_CALLEE_SAVE_REGISTERS(ctx) \
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RESTORE_FPU64_CALLER_SAVE_REGISTERS(tmp)
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#define RESTORE_FPU32_CALLEE_SAVE_REGISTERS(ctx) \
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ldp q4, q5, [ctx, #(THREAD_CONTEXT_FPU32_Q4_Q5)]; \
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ldp q6, q7, [ctx, #(THREAD_CONTEXT_FPU32_Q6_Q7)];
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#define RESTORE_FPU32_CALLER_SAVE_REGISTERS(tmp) \
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ldr tmp, [sp, #(EXCEPTION_CONTEXT_SIZE + THREAD_STACK_PARAMETERS_CALLER_SAVE_FPU_REGISTERS)]; \
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ldp q0, q1, [tmp, #(THREAD_FPU32_CONTEXT_Q0_Q1)]; \
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ldp q2, q3, [tmp, #(THREAD_FPU32_CONTEXT_Q2_Q3)]; \
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ldp q8, q9, [tmp, #(THREAD_FPU32_CONTEXT_Q8_Q9)]; \
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ldp q10, q11, [tmp, #(THREAD_FPU32_CONTEXT_Q10_Q11)]; \
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ldp q12, q13, [tmp, #(THREAD_FPU32_CONTEXT_Q12_Q13)]; \
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ldp q14, q15, [tmp, #(THREAD_FPU32_CONTEXT_Q14_Q15)];
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#define RESTORE_FPU32_ALL_REGISTERS(ctx, tmp) \
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RESTORE_FPU32_CALLEE_SAVE_REGISTERS(ctx) \
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RESTORE_FPU32_CALLER_SAVE_REGISTERS(tmp)
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#define ENABLE_AND_RESTORE_FPU(ctx, xtmp1, xtmp2, wtmp1, wtmp2, label_32, label_done) \
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ENABLE_FPU(xtmp1) \
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GET_THREAD_CONTEXT_AND_RESTORE_FPCR_FPSR(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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\
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ldrb wtmp1, [sp, #(EXCEPTION_CONTEXT_SIZE + THREAD_STACK_PARAMETERS_EXCEPTION_FLAGS)]; \
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tbz wtmp1, #(THREAD_EXCEPTION_FLAG_BIT_INDEX_IS_FPU_64_BIT), label_32##f; \
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\
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RESTORE_FPU64_ALL_REGISTERS(ctx, xtmp1) \
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\
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b label_done##f; \
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\
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label_32: \
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RESTORE_FPU32_ALL_REGISTERS(ctx, xtmp1) \
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label_done:
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#define ENABLE_AND_RESTORE_FPU64(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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ENABLE_FPU(xtmp1) \
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GET_THREAD_CONTEXT_AND_RESTORE_FPCR_FPSR(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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RESTORE_FPU64_ALL_REGISTERS(ctx, xtmp1)
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#define ENABLE_AND_RESTORE_FPU32(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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ENABLE_FPU(xtmp1) \
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GET_THREAD_CONTEXT_AND_RESTORE_FPCR_FPSR(ctx, xtmp1, xtmp2, wtmp1, wtmp2) \
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RESTORE_FPU32_ALL_REGISTERS(ctx, xtmp1)
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#define ERET_WITH_SPECULATION_BARRIER \
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eret; \
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dsb nsh; \
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isb
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