diff options
author | Thomas Huth <thuth@redhat.com> | 2016-10-11 08:56:52 +0200 |
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committer | Thomas Huth <thuth@redhat.com> | 2016-12-20 21:52:12 +0100 |
commit | fcf5ef2ab52c621a4617ebbef36bf43b4003f4c0 (patch) | |
tree | 2b450d96b01455df8ed908bf8f26ddc388a03380 /target-m68k/op_helper.c | |
parent | 82ecffa8c050bf5bbc13329e9b65eac1caa5b55c (diff) |
Move target-* CPU file into a target/ folder
We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.
Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [crisµblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'target-m68k/op_helper.c')
-rw-r--r-- | target-m68k/op_helper.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/target-m68k/op_helper.c b/target-m68k/op_helper.c deleted file mode 100644 index 48e02e4062..0000000000 --- a/target-m68k/op_helper.c +++ /dev/null @@ -1,229 +0,0 @@ -/* - * M68K helper routines - * - * Copyright (c) 2007 CodeSourcery - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ -#include "qemu/osdep.h" -#include "cpu.h" -#include "exec/helper-proto.h" -#include "exec/exec-all.h" -#include "exec/cpu_ldst.h" -#include "exec/semihost.h" - -#if defined(CONFIG_USER_ONLY) - -void m68k_cpu_do_interrupt(CPUState *cs) -{ - cs->exception_index = -1; -} - -static inline void do_interrupt_m68k_hardirq(CPUM68KState *env) -{ -} - -#else - -/* Try to fill the TLB and return an exception if error. If retaddr is - NULL, it means that the function was called in C code (i.e. not - from generated code or from helper.c) */ -void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type, - int mmu_idx, uintptr_t retaddr) -{ - int ret; - - ret = m68k_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx); - if (unlikely(ret)) { - if (retaddr) { - /* now we have a real cpu fault */ - cpu_restore_state(cs, retaddr); - } - cpu_loop_exit(cs); - } -} - -static void do_rte(CPUM68KState *env) -{ - uint32_t sp; - uint32_t fmt; - - sp = env->aregs[7]; - fmt = cpu_ldl_kernel(env, sp); - env->pc = cpu_ldl_kernel(env, sp + 4); - sp |= (fmt >> 28) & 3; - env->aregs[7] = sp + 8; - - helper_set_sr(env, fmt); -} - -static void do_interrupt_all(CPUM68KState *env, int is_hw) -{ - CPUState *cs = CPU(m68k_env_get_cpu(env)); - uint32_t sp; - uint32_t fmt; - uint32_t retaddr; - uint32_t vector; - - fmt = 0; - retaddr = env->pc; - - if (!is_hw) { - switch (cs->exception_index) { - case EXCP_RTE: - /* Return from an exception. */ - do_rte(env); - return; - case EXCP_HALT_INSN: - if (semihosting_enabled() - && (env->sr & SR_S) != 0 - && (env->pc & 3) == 0 - && cpu_lduw_code(env, env->pc - 4) == 0x4e71 - && cpu_ldl_code(env, env->pc) == 0x4e7bf000) { - env->pc += 4; - do_m68k_semihosting(env, env->dregs[0]); - return; - } - cs->halted = 1; - cs->exception_index = EXCP_HLT; - cpu_loop_exit(cs); - return; - } - if (cs->exception_index >= EXCP_TRAP0 - && cs->exception_index <= EXCP_TRAP15) { - /* Move the PC after the trap instruction. */ - retaddr += 2; - } - } - - vector = cs->exception_index << 2; - - fmt |= 0x40000000; - fmt |= vector << 16; - fmt |= env->sr; - fmt |= cpu_m68k_get_ccr(env); - - env->sr |= SR_S; - if (is_hw) { - env->sr = (env->sr & ~SR_I) | (env->pending_level << SR_I_SHIFT); - env->sr &= ~SR_M; - } - m68k_switch_sp(env); - sp = env->aregs[7]; - fmt |= (sp & 3) << 28; - - /* ??? This could cause MMU faults. */ - sp &= ~3; - sp -= 4; - cpu_stl_kernel(env, sp, retaddr); - sp -= 4; - cpu_stl_kernel(env, sp, fmt); - env->aregs[7] = sp; - /* Jump to vector. */ - env->pc = cpu_ldl_kernel(env, env->vbr + vector); -} - -void m68k_cpu_do_interrupt(CPUState *cs) -{ - M68kCPU *cpu = M68K_CPU(cs); - CPUM68KState *env = &cpu->env; - - do_interrupt_all(env, 0); -} - -static inline void do_interrupt_m68k_hardirq(CPUM68KState *env) -{ - do_interrupt_all(env, 1); -} -#endif - -bool m68k_cpu_exec_interrupt(CPUState *cs, int interrupt_request) -{ - M68kCPU *cpu = M68K_CPU(cs); - CPUM68KState *env = &cpu->env; - - if (interrupt_request & CPU_INTERRUPT_HARD - && ((env->sr & SR_I) >> SR_I_SHIFT) < env->pending_level) { - /* Real hardware gets the interrupt vector via an IACK cycle - at this point. Current emulated hardware doesn't rely on - this, so we provide/save the vector when the interrupt is - first signalled. */ - cs->exception_index = env->pending_vector; - do_interrupt_m68k_hardirq(env); - return true; - } - return false; -} - -static void raise_exception(CPUM68KState *env, int tt) -{ - CPUState *cs = CPU(m68k_env_get_cpu(env)); - - cs->exception_index = tt; - cpu_loop_exit(cs); -} - -void HELPER(raise_exception)(CPUM68KState *env, uint32_t tt) -{ - raise_exception(env, tt); -} - -void HELPER(divu)(CPUM68KState *env, uint32_t word) -{ - uint32_t num; - uint32_t den; - uint32_t quot; - uint32_t rem; - - num = env->div1; - den = env->div2; - /* ??? This needs to make sure the throwing location is accurate. */ - if (den == 0) { - raise_exception(env, EXCP_DIV0); - } - quot = num / den; - rem = num % den; - - env->cc_v = (word && quot > 0xffff ? -1 : 0); - env->cc_z = quot; - env->cc_n = quot; - env->cc_c = 0; - - env->div1 = quot; - env->div2 = rem; -} - -void HELPER(divs)(CPUM68KState *env, uint32_t word) -{ - int32_t num; - int32_t den; - int32_t quot; - int32_t rem; - - num = env->div1; - den = env->div2; - if (den == 0) { - raise_exception(env, EXCP_DIV0); - } - quot = num / den; - rem = num % den; - - env->cc_v = (word && quot != (int16_t)quot ? -1 : 0); - env->cc_z = quot; - env->cc_n = quot; - env->cc_c = 0; - - env->div1 = quot; - env->div2 = rem; -} |