| Message ID | 1634561247-25499-3-git-send-email-gaosong@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add LoongArch linux-user emulation support | expand |
Hi Song, On 10/18/21 20:47, Song Gao wrote: > This patch add target state header, target definitions > and initialization routines. "adds"; fix in other patches too. > > Signed-off-by: Song Gao <gaosong@loongson.cn> > Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> > Reviewed-by: Richard Henderson <richard.henderson@linaro.org> > --- > target/loongarch/cpu-param.h | 19 +++ > target/loongarch/cpu.c | 285 +++++++++++++++++++++++++++++++++++++++++++ > target/loongarch/cpu.h | 151 +++++++++++++++++++++++ > target/loongarch/internals.h | 23 ++++ > 4 files changed, 478 insertions(+) > create mode 100644 target/loongarch/cpu-param.h > create mode 100644 target/loongarch/cpu.c > create mode 100644 target/loongarch/cpu.h > create mode 100644 target/loongarch/internals.h > > diff --git a/target/loongarch/cpu-param.h b/target/loongarch/cpu-param.h > new file mode 100644 > index 0000000..83f9624 > --- /dev/null > +++ b/target/loongarch/cpu-param.h > @@ -0,0 +1,19 @@ > +/* > + * LoongArch cpu parameters for qemu. Nit: "LoongArch CPU parameters for QEMU"; fix your capitalization everywhere too, I wouldn't comment at every place like this for better SNR. > + * > + * Copyright (c) 2021 Loongson Technology Corporation Limited > + * > + * SPDX-License-Identifier: LGPL-2.1+ > + */ > + > +#ifndef LOONGARCH_CPU_PARAM_H > +#define LOONGARCH_CPU_PARAM_H 1 Is this "1" necessary? > + > +#define TARGET_LONG_BITS 64 > +#define TARGET_PHYS_ADDR_SPACE_BITS 48 > +#define TARGET_VIRT_ADDR_SPACE_BITS 48 > + > +#define TARGET_PAGE_BITS 14 > +#define NB_MMU_MODES 4 > + > +#endif > diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c > new file mode 100644 > index 0000000..751da2b > --- /dev/null > +++ b/target/loongarch/cpu.c > @@ -0,0 +1,285 @@ > +/* > + * QEMU LoongArch CPU > + * > + * Copyright (c) 2021 Loongson Technology Corporation Limited > + * > + * SPDX-License-Identifier: LGPL-2.1+ > + */ > + > +#include "qemu/osdep.h" > +#include "qemu/qemu-print.h" > +#include "qapi/error.h" > +#include "qemu/module.h" > +#include "sysemu/qtest.h" > +#include "exec/exec-all.h" > +#include "qapi/qapi-commands-machine-target.h" > +#include "cpu.h" > +#include "internals.h" > +#include "fpu/softfloat-helpers.h" > + > +const char * const regnames[] = { > + "r0", "ra", "tp", "sp", "a0", "a1", "a2", "a3", Why "r0" instead of "zero", with all other registers having the respective ABI names? > + "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", > + "t4", "t5", "t6", "t7", "t8", "x0", "fp", "s0", The "reserved" register has no ABI name according to the LoongArch ABI spec [1], so it's better named "r21" to avoid any confusion. [1]: https://github.com/loongson/LoongArch-Documentation/blob/50e62f196afd4fae7f25dc98854167f97528046b/docs/LoongArch-ELF-ABI-EN.adoc > + "s1", "s2", "s3", "s4", "s5", "s6", "s7", "s8", > +}; > + > +const char * const fregnames[] = { > + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", > + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", > + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", > + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", Since you used ABI names for the integer registers, why not do the same to the FP ones? > +}; > + > +static const char * const excp_names[EXCP_LAST + 1] = { > + [EXCP_ADE] = "Address error", > + [EXCP_SYSCALL] = "Syscall", > + [EXCP_BREAK] = "Break", > + [EXCP_INE] = "Inst. Not Exist", Nit: "Instruction Non-existent", no need to shorten "instruction" like this IMO; no other similar usages exist so this would not be consistent. > + [EXCP_FPE] = "Floating Point Exception", > +}; > + > +const char *loongarch_exception_name(int32_t exception) > +{ > + if (exception < 0 || exception > EXCP_LAST) { > + return "unknown"; All known exception names are Title Cased, so "Unknown" here? > + } > + return excp_names[exception]; > +} > + > +void QEMU_NORETURN do_raise_exception(CPULoongArchState *env, > + uint32_t exception, > + uintptr_t pc) > +{ > + CPUState *cs = env_cpu(env); > + > + qemu_log_mask(CPU_LOG_INT, "%s: %d (%s)\n", > + __func__, > + exception, > + loongarch_exception_name(exception)); > + cs->exception_index = exception; > + > + cpu_loop_exit_restore(cs, pc); > +} > + > +static void loongarch_cpu_set_pc(CPUState *cs, vaddr value) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(cs); > + CPULoongArchState *env = &cpu->env; > + > + env->pc = value; > +} > + > +#ifdef CONFIG_TCG > +static void loongarch_cpu_synchronize_from_tb(CPUState *cs, > + const TranslationBlock *tb) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(cs); > + CPULoongArchState *env = &cpu->env; > + > + env->pc = tb->pc; > +} > +#endif /* CONFIG_TCG */ > + > +static bool loongarch_cpu_has_work(CPUState *cs) > +{ > + return true; > +} > + > +static void set_loongarch_cpucfg(CPULoongArchState *env) > +{ > + int i; > + > + for (i = 0; i < 49; i++) { > + env->cpucfg[i] = 0x0; > + } > + env->cpucfg[0] = 0x14c010; > + env->cpucfg[1] = 0x3f2f2fe; > + env->cpucfg[2] = 0x60c3cf; > + env->cpucfg[3] = 0xcff; > + env->cpucfg[4] = 0x5f5e100; > + env->cpucfg[5] = 0x10001; > + env->cpucfg[16] = 0x2c3d; > + env->cpucfg[17] = 0x6080003; > + env->cpucfg[18] = 0x6080003; > + env->cpucfg[19] = 0x60800f; > + env->cpucfg[20] = 0x60f000f; I know these values are taken from a real 3A5000 chip, since I have such a machine and I've done the experiment, but others likely wouldn't notice so quickly. Maybe put some comment on top of this function to illustrate this? > +} > + > +/* LoongArch CPU definitions */ Doc-string for such a function should be verb phrase; but in this case would it be better to just drop the comment? The code is pretty concise and self-documenting after all. > +static void loongarch_3a5000_initfn(Object *obj) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(obj); > + CPULoongArchState *env = &cpu->env; > + > + set_loongarch_cpucfg(env); > +} > + > +static void loongarch_cpu_list_entry(gpointer data, gpointer user_data) > +{ > + const char *typename = object_class_get_name(OBJECT_CLASS(data)); > + > + qemu_printf("%s\n", typename); > +} > + > +void loongarch_cpu_list(void) > +{ > + GSList *list; > + list = object_class_get_list_sorted(TYPE_LOONGARCH_CPU, false); > + g_slist_foreach(list, loongarch_cpu_list_entry, NULL); > + g_slist_free(list); > +} > + > +static void loongarch_cpu_reset(DeviceState *dev) > +{ > + CPUState *cs = CPU(dev); > + LoongArchCPU *cpu = LOONGARCH_CPU(cs); > + LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(cpu); > + CPULoongArchState *env = &cpu->env; > + > + lacc->parent_reset(dev); > + > + set_loongarch_cpucfg(env); > + env->fcsr0_mask = 0x1f1f031f; > + env->fcsr0 = 0x0; > + > + cs->exception_index = EXCP_NONE; > +} > + > +static void loongarch_cpu_disas_set_info(CPUState *s, disassemble_info *info) > +{ > + info->print_insn = print_insn_loongarch; > +} > + > +static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) > +{ > + CPUState *cs = CPU(dev); > + LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(dev); > + Error *local_err = NULL; > + > + cpu_exec_realizefn(cs, &local_err); > + if (local_err != NULL) { > + error_propagate(errp, local_err); > + return; > + } > + > + cpu_reset(cs); > + qemu_init_vcpu(cs); > + > + lacc->parent_realize(dev, errp); > +} > + > +static void loongarch_cpu_initfn(Object *obj) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(obj); > + > + cpu_set_cpustate_pointers(cpu); > +} > + > +static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) > +{ > + ObjectClass *oc; > + char *typename; > + > + typename = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model); > + oc = object_class_by_name(typename); > + g_free(typename); > + return oc; > +} > + > +void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(cs); > + CPULoongArchState *env = &cpu->env; > + int i; > + > + qemu_fprintf(f, " PC=%016" PRIx64 " ", env->pc); > + qemu_fprintf(f, " FCSR0 0x%08x fp_status 0x%02x\n", env->fcsr0, > + get_float_exception_flags(&env->fp_status)); > + > + /* gpr */ > + for (i = 0; i < 32; i++) { > + if ((i & 3) == 0) { > + qemu_fprintf(f, " GPR%02d:", i); > + } > + qemu_fprintf(f, " %s %016" PRIx64, regnames[i], env->gpr[i]); > + if ((i & 3) == 3) { > + qemu_fprintf(f, "\n"); > + } > + } > + > + /* fpr */ > + if (flags & CPU_DUMP_FPU) { > + for (i = 0; i < 32; i++) { > + qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i]); > + if ((i & 3) == 3) { > + qemu_fprintf(f, "\n"); > + } > + } > + } > +} > + > +#ifdef CONFIG_TCG > +#include "hw/core/tcg-cpu-ops.h" > + > +static bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address, int size, > + MMUAccessType access_type, int mmu_idx, > + bool probe, uintptr_t retaddr) > +{ > + LoongArchCPU *cpu = LOONGARCH_CPU(cs); > + CPULoongArchState *env = &cpu->env; > + > + env->badaddr = address; > + cs->exception_index = EXCP_ADE; > + do_raise_exception(env, cs->exception_index, retaddr); > +} > + > +static struct TCGCPUOps loongarch_tcg_ops = { > + .initialize = loongarch_translate_init, > + .synchronize_from_tb = loongarch_cpu_synchronize_from_tb, > + .tlb_fill = loongarch_cpu_tlb_fill, > +}; > +#endif /* CONFIG_TCG */ > + > +static void loongarch_cpu_class_init(ObjectClass *c, void *data) > +{ > + LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c); > + CPUClass *cc = CPU_CLASS(c); > + DeviceClass *dc = DEVICE_CLASS(c); > + > + device_class_set_parent_realize(dc, loongarch_cpu_realizefn, > + &lacc->parent_realize); > + device_class_set_parent_reset(dc, loongarch_cpu_reset, &lacc->parent_reset); > + > + cc->class_by_name = loongarch_cpu_class_by_name; > + cc->has_work = loongarch_cpu_has_work; > + cc->dump_state = loongarch_cpu_dump_state; > + cc->set_pc = loongarch_cpu_set_pc; > + cc->disas_set_info = loongarch_cpu_disas_set_info; > +#ifdef CONFIG_TCG > + cc->tcg_ops = &loongarch_tcg_ops; > +#endif > +} > + > +#define DEFINE_LOONGARCH_CPU_TYPE(model, initfn) \ > + { \ > + .parent = TYPE_LOONGARCH_CPU, \ > + .instance_init = initfn, \ > + .name = LOONGARCH_CPU_TYPE_NAME(model), \ > + } > + > +static const TypeInfo loongarch_cpu_type_infos[] = { > + { > + .name = TYPE_LOONGARCH_CPU, > + .parent = TYPE_CPU, > + .instance_size = sizeof(LoongArchCPU), > + .instance_init = loongarch_cpu_initfn, > + > + .abstract = true, > + .class_size = sizeof(LoongArchCPUClass), > + .class_init = loongarch_cpu_class_init, > + }, > + DEFINE_LOONGARCH_CPU_TYPE("Loongson-3A5000", loongarch_3a5000_initfn), > +}; > + > +DEFINE_TYPES(loongarch_cpu_type_infos) > diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h > new file mode 100644 > index 0000000..a4991f9 > --- /dev/null > +++ b/target/loongarch/cpu.h > @@ -0,0 +1,151 @@ > +/* > + * QEMU LoongArch CPU > + * > + * Copyright (c) 2021 Loongson Technology Corporation Limited > + * > + * SPDX-License-Identifier: LGPL-2.1+ > + */ > + > +#ifndef LOONGARCH_CPU_H > +#define LOONGARCH_CPU_H > + > +#include "exec/cpu-defs.h" > +#include "fpu/softfloat-types.h" > +#include "hw/registerfields.h" > + > +#define TCG_GUEST_DEFAULT_MO (0) > + > +#define FCSR0_M1 0x1f /* FCSR1 mask, Enables */ > +#define FCSR0_M2 0x1f1f0000 /* FCSR2 mask, Cause and Flags */ > +#define FCSR0_M3 0x300 /* FCSR3 mask, Round Mode */ > +#define FCSR0_RM 8 /* Round Mode bit num on fcsr0 */ > + > +FIELD(FCSR0, ENABLES, 0, 5) > +FIELD(FCSR0, RM, 8, 2) > +FIELD(FCSR0, FLAGS, 16, 5) > +FIELD(FCSR0, CAUSE, 24, 5) > + > +#define GET_FP_CAUSE(REG) FIELD_EX32(REG, FCSR0, CAUSE) > +#define SET_FP_CAUSE(REG, V) FIELD_DP32(REG, FCSR0, CAUSE, V) > +#define GET_FP_ENABLES(REG) FIELD_EX32(REG, FCSR0, ENABLES) > +#define SET_FP_ENABLES(REG, V) FIELD_DP32(REG, FCSR0, ENABLES, V) > +#define GET_FP_FLAGS(REG) FIELD_EX32(REG, FCSR0, FLAGS) > +#define SET_FP_FLAGS(REG, V) FIELD_DP32(REG, FCSR0, FLAGS, V) > +#define UPDATE_FP_FLAGS(REG, V) \ > + do { \ > + (REG) |= FIELD_DP32(0, FCSR0, FLAGS, V); \ > + } while (0) > + > +#define FP_INEXACT 1 > +#define FP_UNDERFLOW 2 > +#define FP_OVERFLOW 4 > +#define FP_DIV0 8 > +#define FP_INVALID 16 > + > +extern const char * const regnames[]; > +extern const char * const fregnames[]; > + > +typedef struct CPULoongArchState CPULoongArchState; > +struct CPULoongArchState { > + uint64_t gpr[32]; > + uint64_t pc; > + > + uint64_t fpr[32]; > + float_status fp_status; > + bool cf[8]; > + > + /* > + * fcsr0 > + * 31:29 |28:24 |23:21 |20:16 |15:10 |9:8 |7:5 |4:0 > + * Cause Flags RM Enables > + */ > + uint32_t fcsr0; > + uint32_t fcsr0_mask; > + > + uint32_t cpucfg[49]; > + > + uint64_t lladdr; /* LL virtual address compared against SC */ > + uint64_t llval; > + > + uint64_t badaddr; > +}; > + > +/** > + * LoongArchCPU: > + * @env: #CPULoongArchState > + * > + * A LoongArch CPU. > + */ > +struct LoongArchCPU { > + /*< private >*/ > + CPUState parent_obj; > + /*< public >*/ > + > + CPUNegativeOffsetState neg; > + CPULoongArchState env; > +}; > + > +#define TYPE_LOONGARCH_CPU "loongarch64-cpu" "loongarch-cpu"? There's no mention of 64-bit-specific logic anywhere near. > + > +OBJECT_DECLARE_TYPE(LoongArchCPU, LoongArchCPUClass, > + LOONGARCH_CPU) > + > +/** > + * LoongArchCPUClass: > + * @parent_realize: The parent class' realize handler. > + * @parent_reset: The parent class' reset handler. > + * > + * A LoongArch CPU model. > + */ > +struct LoongArchCPUClass { > + /*< private >*/ > + CPUClass parent_class; > + /*< public >*/ > + > + DeviceRealize parent_realize; > + DeviceReset parent_reset; > +}; > + > +static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, > + target_ulong *pc, > + target_ulong *cs_base, > + uint32_t *flags) > +{ > + *pc = env->pc; > + *cs_base = 0; > + *flags = 0; > +} > + > +void loongarch_cpu_list(void); > + > +#define cpu_list loongarch_cpu_list > + > +#define MMU_USER_IDX 3 > + > +static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch) > +{ > + return MMU_USER_IDX; > +} > + > +typedef CPULoongArchState CPUArchState; > +typedef LoongArchCPU ArchCPU; > + > +#include "exec/cpu-all.h" > + > +/* Exceptions */ > +enum { > + EXCP_NONE = -1, > + EXCP_ADE = 0, > + EXCP_SYSCALL, > + EXCP_BREAK, > + EXCP_INE, > + EXCP_FPE, > + > + EXCP_LAST = EXCP_FPE, > +}; > + > +#define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU > +#define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX > +#define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU > + > +#endif /* LOONGARCH_CPU_H */ > diff --git a/target/loongarch/internals.h b/target/loongarch/internals.h > new file mode 100644 > index 0000000..cfb08df > --- /dev/null > +++ b/target/loongarch/internals.h > @@ -0,0 +1,23 @@ > +/* > + * QEMU LoongArch CPU -- internal functions and types > + * > + * Copyright (c) 2021 Loongson Technology Corporation Limited > + * > + * SPDX-License-Identifier: LGPL-2.1+ > + */ > + > +#ifndef LOONGARCH_INTERNALS_H > +#define LOONGARCH_INTERNALS_H > + > + > +void loongarch_translate_init(void); > + > +void loongarch_cpu_dump_state(CPUState *cpu, FILE *f, int flags); > + > +void QEMU_NORETURN do_raise_exception(CPULoongArchState *env, > + uint32_t exception, > + uintptr_t pc); > + > +const char *loongarch_exception_name(int32_t exception); > + > +#endif
On 10/18/21 18:06, WANG Xuerui wrote: > Hi Song, > > On 10/18/21 20:47, Song Gao wrote: >> This patch add target state header, target definitions >> and initialization routines. > "adds"; fix in other patches too. >> >> Signed-off-by: Song Gao <gaosong@loongson.cn> >> Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> >> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> >> --- >> target/loongarch/cpu-param.h | 19 +++ >> target/loongarch/cpu.c | 285 >> +++++++++++++++++++++++++++++++++++++++++++ >> target/loongarch/cpu.h | 151 +++++++++++++++++++++++ >> target/loongarch/internals.h | 23 ++++ >> 4 files changed, 478 insertions(+) >> create mode 100644 target/loongarch/cpu-param.h >> create mode 100644 target/loongarch/cpu.c >> create mode 100644 target/loongarch/cpu.h >> create mode 100644 target/loongarch/internals.h >> +static void set_loongarch_cpucfg(CPULoongArchState *env) >> +{ >> + int i; >> + >> + for (i = 0; i < 49; i++) { >> + env->cpucfg[i] = 0x0; >> + } >> + env->cpucfg[0] = 0x14c010; >> + env->cpucfg[1] = 0x3f2f2fe; >> + env->cpucfg[2] = 0x60c3cf; >> + env->cpucfg[3] = 0xcff; >> + env->cpucfg[4] = 0x5f5e100; >> + env->cpucfg[5] = 0x10001; >> + env->cpucfg[16] = 0x2c3d; >> + env->cpucfg[17] = 0x6080003; >> + env->cpucfg[18] = 0x6080003; >> + env->cpucfg[19] = 0x60800f; >> + env->cpucfg[20] = 0x60f000f; > I know these values are taken from a real 3A5000 chip, since I have such > a machine and I've done the experiment, but others likely wouldn't > notice so quickly. Maybe put some comment on top of this function to > illustrate this? Simpler: ... >> +} >> + >> +/* LoongArch CPU definitions */ > Doc-string for such a function should be verb phrase; but in this case > would it be better to just drop the comment? The code is pretty concise > and self-documenting after all. >> +static void loongarch_3a5000_initfn(Object *obj) >> +{ >> + LoongArchCPU *cpu = LOONGARCH_CPU(obj); >> + CPULoongArchState *env = &cpu->env; >> + >> + set_loongarch_cpucfg(env); ... directly inline here. >> +}
Hi, Xuerui, Philippe. On 10/19/2021 01:38 AM, Philippe Mathieu-Daudé wrote: > On 10/18/21 18:06, WANG Xuerui wrote: >> Hi Song, >> >> On 10/18/21 20:47, Song Gao wrote: >>> This patch add target state header, target definitions >>> and initialization routines. >> "adds"; fix in other patches too. >>> >>> Signed-off-by: Song Gao <gaosong@loongson.cn> >>> Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> >>> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> >>> --- >>> target/loongarch/cpu-param.h | 19 +++ >>> target/loongarch/cpu.c | 285 >>> +++++++++++++++++++++++++++++++++++++++++++ >>> target/loongarch/cpu.h | 151 +++++++++++++++++++++++ >>> target/loongarch/internals.h | 23 ++++ >>> 4 files changed, 478 insertions(+) >>> create mode 100644 target/loongarch/cpu-param.h >>> create mode 100644 target/loongarch/cpu.c >>> create mode 100644 target/loongarch/cpu.h >>> create mode 100644 target/loongarch/internals.h > > >>> +static void set_loongarch_cpucfg(CPULoongArchState *env) >>> +{ >>> + int i; >>> + >>> + for (i = 0; i < 49; i++) { >>> + env->cpucfg[i] = 0x0; >>> + } >>> + env->cpucfg[0] = 0x14c010; >>> + env->cpucfg[1] = 0x3f2f2fe; >>> + env->cpucfg[2] = 0x60c3cf; >>> + env->cpucfg[3] = 0xcff; >>> + env->cpucfg[4] = 0x5f5e100; >>> + env->cpucfg[5] = 0x10001; >>> + env->cpucfg[16] = 0x2c3d; >>> + env->cpucfg[17] = 0x6080003; >>> + env->cpucfg[18] = 0x6080003; >>> + env->cpucfg[19] = 0x60800f; >>> + env->cpucfg[20] = 0x60f000f; >> I know these values are taken from a real 3A5000 chip, since I have such >> a machine and I've done the experiment, but others likely wouldn't >> notice so quickly. Maybe put some comment on top of this function to >> illustrate this? > > Simpler: ... > On linux-user emulation. We don't care about the value of cpucfg[i]. I think we only need to set cpucfg[i] to 0. and set value on system emulations, is that better? >>> +} >>> + >>> +/* LoongArch CPU definitions */ >> Doc-string for such a function should be verb phrase; but in this case >> would it be better to just drop the comment? The code is pretty concise >> and self-documenting after all. >>> +static void loongarch_3a5000_initfn(Object *obj) >>> +{ >>> + LoongArchCPU *cpu = LOONGARCH_CPU(obj); >>> + CPULoongArchState *env = &cpu->env; >>> + >>> + set_loongarch_cpucfg(env); > > ... directly inline here. > OK. Thanks Song Gao >>> +}
On 2021/10/20 16:54, Song Gao wrote: > On 10/19/2021 01:38 AM, Philippe Mathieu-Daudé wrote: >> On 10/18/21 18:06, WANG Xuerui wrote: >> >> On 10/18/21 20:47, Song Gao wrote: >>>> +static void set_loongarch_cpucfg(CPULoongArchState *env) >>>> +{ >>>> + int i; >>>> + >>>> + for (i = 0; i < 49; i++) { >>>> + env->cpucfg[i] = 0x0; >>>> + } >>>> + env->cpucfg[0] = 0x14c010; >>>> + env->cpucfg[1] = 0x3f2f2fe; >>>> + env->cpucfg[2] = 0x60c3cf; >>>> + env->cpucfg[3] = 0xcff; >>>> + env->cpucfg[4] = 0x5f5e100; >>>> + env->cpucfg[5] = 0x10001; >>>> + env->cpucfg[16] = 0x2c3d; >>>> + env->cpucfg[17] = 0x6080003; >>>> + env->cpucfg[18] = 0x6080003; >>>> + env->cpucfg[19] = 0x60800f; >>>> + env->cpucfg[20] = 0x60f000f; >>> I know these values are taken from a real 3A5000 chip, since I have such >>> a machine and I've done the experiment, but others likely wouldn't >>> notice so quickly. Maybe put some comment on top of this function to >>> illustrate this? >> Simpler: ... >> > On linux-user emulation. We don't care about the value of cpucfg[i]. > I think we only need to set cpucfg[i] to 0. and set value on system emulations, is that better? I'm afraid that wouldn't be better; actually it would be *wrong* to just return zeroes for user-space CPUCFG accesses. CPUCFG is designed to provide runtime feature probing like CPUID, and is usable from user-space. So, one can only assume this data is being used, and properly return data. I've heard that kernel could choose to not actually enable all features for which CPUCFG indicate support, while not configuring CPUCFG values to reflect that, thus making CPUCFG values unreliable; that's not a proper reason to return zeroes. Kernel should be fixed to properly configure CPUCFG instead. Because otherwise you wouldn't make such an instruction an unprivileged one in the first place...
On 10/20/21 5:00 AM, WANG Xuerui wrote: > On 2021/10/20 16:54, Song Gao wrote: > >> On 10/19/2021 01:38 AM, Philippe Mathieu-Daudé wrote: >>> On 10/18/21 18:06, WANG Xuerui wrote: >>> >>> On 10/18/21 20:47, Song Gao wrote: >>>>> +static void set_loongarch_cpucfg(CPULoongArchState *env) >>>>> +{ >>>>> + int i; >>>>> + >>>>> + for (i = 0; i < 49; i++) { >>>>> + env->cpucfg[i] = 0x0; >>>>> + } >>>>> + env->cpucfg[0] = 0x14c010; >>>>> + env->cpucfg[1] = 0x3f2f2fe; >>>>> + env->cpucfg[2] = 0x60c3cf; >>>>> + env->cpucfg[3] = 0xcff; >>>>> + env->cpucfg[4] = 0x5f5e100; >>>>> + env->cpucfg[5] = 0x10001; >>>>> + env->cpucfg[16] = 0x2c3d; >>>>> + env->cpucfg[17] = 0x6080003; >>>>> + env->cpucfg[18] = 0x6080003; >>>>> + env->cpucfg[19] = 0x60800f; >>>>> + env->cpucfg[20] = 0x60f000f; >>>> I know these values are taken from a real 3A5000 chip, since I have such >>>> a machine and I've done the experiment, but others likely wouldn't >>>> notice so quickly. Maybe put some comment on top of this function to >>>> illustrate this? >>> Simpler: ... >>> >> On linux-user emulation. We don't care about the value of cpucfg[i]. >> I think we only need to set cpucfg[i] to 0. and set value on system emulations, is that better? > > I'm afraid that wouldn't be better; actually it would be *wrong* to just > return zeroes for user-space CPUCFG accesses. CPUCFG is designed to > provide runtime feature probing like CPUID, and is usable from > user-space. So, one can only assume this data is being used, and > properly return data. > > I've heard that kernel could choose to not actually enable all features > for which CPUCFG indicate support, while not configuring CPUCFG values > to reflect that, thus making CPUCFG values unreliable; that's not a > proper reason to return zeroes. Kernel should be fixed to properly > configure CPUCFG instead. Because otherwise you wouldn't make such an > instruction an unprivileged one in the first place... In the meantime, I think you really need to filter these values to those you have implemented. E.g. cpucfg[2].LASX here indicates support for the 256-bit vector extension. Similarly the COMPLEX and CRYPTO extensions. I think you would do well to add some FIELD definitions so that these can be set symbolically. r~
Hi, all On 10/20/2021 09:56 PM, Richard Henderson wrote: > On 10/20/21 5:00 AM, WANG Xuerui wrote: >> On 2021/10/20 16:54, Song Gao wrote: >> >>> On 10/19/2021 01:38 AM, Philippe Mathieu-Daudé wrote: >>>> On 10/18/21 18:06, WANG Xuerui wrote: >>>> >>>> On 10/18/21 20:47, Song Gao wrote: >>>>>> +static void set_loongarch_cpucfg(CPULoongArchState *env) >>>>>> +{ >>>>>> + int i; >>>>>> + >>>>>> + for (i = 0; i < 49; i++) { >>>>>> + env->cpucfg[i] = 0x0; >>>>>> + } >>>>>> + env->cpucfg[0] = 0x14c010; >>>>>> + env->cpucfg[1] = 0x3f2f2fe; >>>>>> + env->cpucfg[2] = 0x60c3cf; >>>>>> + env->cpucfg[3] = 0xcff; >>>>>> + env->cpucfg[4] = 0x5f5e100; >>>>>> + env->cpucfg[5] = 0x10001; >>>>>> + env->cpucfg[16] = 0x2c3d; >>>>>> + env->cpucfg[17] = 0x6080003; >>>>>> + env->cpucfg[18] = 0x6080003; >>>>>> + env->cpucfg[19] = 0x60800f; >>>>>> + env->cpucfg[20] = 0x60f000f; >>>>> I know these values are taken from a real 3A5000 chip, since I have such >>>>> a machine and I've done the experiment, but others likely wouldn't >>>>> notice so quickly. Maybe put some comment on top of this function to >>>>> illustrate this? >>>> Simpler: ... >>>> >>> On linux-user emulation. We don't care about the value of cpucfg[i]. >>> I think we only need to set cpucfg[i] to 0. and set value on system emulations, is that better? >> >> I'm afraid that wouldn't be better; actually it would be *wrong* to just >> return zeroes for user-space CPUCFG accesses. CPUCFG is designed to >> provide runtime feature probing like CPUID, and is usable from >> user-space. So, one can only assume this data is being used, and >> properly return data. >> >> I've heard that kernel could choose to not actually enable all features >> for which CPUCFG indicate support, while not configuring CPUCFG values >> to reflect that, thus making CPUCFG values unreliable; that's not a >> proper reason to return zeroes. Kernel should be fixed to properly >> configure CPUCFG instead. Because otherwise you wouldn't make such an >> instruction an unprivileged one in the first place... > > In the meantime, I think you really need to filter these values to those you have implemented. E.g. cpucfg[2].LASX here indicates support for the 256-bit vector extension. Similarly the COMPLEX and CRYPTO extensions. > > I think you would do well to add some FIELD definitions so that these can be set symbolically. > OK. BTW, Account yangxiaojuan@loongson.cn It seems that she has been blacklisted. Xiaojuan sent 31 e-mails, which were not displayed since the 21st one, people who don't have a CC can't read all the emails, and xiaojuan reply can't be in qemu-level@nongnu.org. The follow is the return message: 抱歉，您的邮件被退回来了……/ Sorry, your mail is returned... 原邮件信息/ Original e-mail message : 时间/Time : 2021-10-20 09:33:59 主题/Subject : Re: Re: [PATCH 00/31] Add Loongarch softmmu support. 收件人/To : qemu-devel@nongnu.org 退信原因/ Bounce reason : 由于对方服务器不稳定，或者双方服务器网络连接质量不佳，或者防火墙过滤，而无法连接上对方服务器。 Can not connect to recipient's server because of unstable network or firewall filter. rcpt handle timeout,last handle info: Can not connect to nongnu.org:2001:470:142:3::10:25 建议解决方案/ Proposed Solution : 邮差温馨提示：请在稍后时间重新尝试投递，或者联系联系管理员、技术中心协助。/ Warm tips:Please try again later, or contact administrator or helpcenter for help. 如果您有其他退信问题，欢迎向客服中心联系/ If you have any other bounce problems, please contact customer service center 退信代码/ Bounce Code : can not connect to ---------------- This message is generated by Coremail. Xuerui said: "You may address the several review comments then just send v2. This way the threading is less likely to be damaged (you need to exactly specify In-Reply-To headers and such for the re-sent patches to correctly link to this thread, I think it's not worth the effort). " I think this will have the same problem. Richard and Karl, How can we solve this problem？ Thanks Song Gao. > > r~
On 10/21/21 11:21, Song Gao wrote: > BTW, > Account yangxiaojuan@loongson.cn It seems that she has been blacklisted. Xiaojuan sent 31 e-mails, which were not displayed since the 21st one, people who don't have a CC can't read all the emails, and xiaojuan reply can't be in qemu-level@nongnu.org. > > <snip> > > > Xuerui said: > > "You may address the several review comments then just send v2. This way > the threading is less likely to be damaged (you need to exactly specify > In-Reply-To headers and such for the re-sent patches to correctly link > to this thread, I think it's not worth the effort). " > > I think this will have the same problem. > > Richard and Karl, How can we solve this problem？ You and Xiaojuan seem to be in some kind of close cooperation; for example every patch from you has double Signed-off-by lines. So I suppose you could just switch to the intended branch and `git send-email` for her; proper "From:" lines will be prepended to every mail where Git author differs from git-send-email identity. Just remember not to commit/send blobs next time though. As for the supposed "ban" on Xiaojuan's account, we cannot diagnose this without mailing list owners' help; maybe it was just some kind of automatic temporary ban, or even connectivity problem on Loongson's side.
WANG Xuerui wrote: > Song Gao wrote: > > Account yangxiaojuan@loongson.cn It seems that she has been > > blacklisted. Xiaojuan sent 31 e-mails, which were not displayed > > since the 21st one, people who don't have a CC can't read all the > > emails, and xiaojuan reply can't be in qemu-level@nongnu.org. I see 18 mails of a patchset accepted and delivered on 10/19 just two days ago from yangxiaojuan@loongson.cn. Therefore it does not seem like there is a problem on the mailing list side of things. > > Richard and Karl, How can we solve this problem? >... > As for the supposed "ban" on Xiaojuan's account, we cannot diagnose this > without mailing list owners' help; maybe it was just some kind of automatic > temporary ban, or even connectivity problem on Loongson's side. The list owners were CC'd on the previous message and this one. That includes a team of people which includes both Karl and myself and others. It appears I have read and responded to this message first. The rejection message that was included said: 2021-10-20 09:33:59 (in an unknown timezone) Can not connect to recipient's server because of unstable network or firewall filter. rcpt handle timeout,last handle info: Can not connect to nongnu.org:2001:470:142:3::10:25 I suggest opening a help ticket on this issue by sending a new message to sysadmin@gnu.org where the FSF admins can look into the problem. They are the only ones that can look at the incoming mail logs. Perhaps they can tell if there was anything logged. It would be good to know the exact time that the connection problem occurred. Bob
Hi,Bob Thank you for your advice, I'll try. Thanks Xiaojuan, Yang 在 2021年10月22日 08:12, Bob Proulx 写道: > WANG Xuerui wrote: >> Song Gao wrote: >>> Account yangxiaojuan@loongson.cn It seems that she has been >>> blacklisted. Xiaojuan sent 31 e-mails, which were not displayed >>> since the 21st one, people who don't have a CC can't read all the >>> emails, and xiaojuan reply can't be in qemu-level@nongnu.org. > > I see 18 mails of a patchset accepted and delivered on 10/19 just two > days ago from yangxiaojuan@loongson.cn. Therefore it does not seem > like there is a problem on the mailing list side of things. > >>> Richard and Karl, How can we solve this problem? >> ... >> As for the supposed "ban" on Xiaojuan's account, we cannot diagnose this >> without mailing list owners' help; maybe it was just some kind of automatic >> temporary ban, or even connectivity problem on Loongson's side. > > The list owners were CC'd on the previous message and this one. That > includes a team of people which includes both Karl and myself and > others. It appears I have read and responded to this message first. > > The rejection message that was included said: > > 2021-10-20 09:33:59 (in an unknown timezone) > Can not connect to recipient's server because of unstable network or firewall filter. > rcpt handle timeout,last handle info: Can not connect to nongnu.org:2001:470:142:3::10:25 > > I suggest opening a help ticket on this issue by sending a new message > to sysadmin@gnu.org where the FSF admins can look into the problem. > They are the only ones that can look at the incoming mail logs. > Perhaps they can tell if there was anything logged. It would be good > to know the exact time that the connection problem occurred. > > Bob >
diff --git a/target/loongarch/cpu-param.h b/target/loongarch/cpu-param.h new file mode 100644 index 0000000..83f9624 --- /dev/null +++ b/target/loongarch/cpu-param.h @@ -0,0 +1,19 @@ +/* + * LoongArch cpu parameters for qemu. + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_CPU_PARAM_H +#define LOONGARCH_CPU_PARAM_H 1 + +#define TARGET_LONG_BITS 64 +#define TARGET_PHYS_ADDR_SPACE_BITS 48 +#define TARGET_VIRT_ADDR_SPACE_BITS 48 + +#define TARGET_PAGE_BITS 14 +#define NB_MMU_MODES 4 + +#endif diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c new file mode 100644 index 0000000..751da2b --- /dev/null +++ b/target/loongarch/cpu.c @@ -0,0 +1,285 @@ +/* + * QEMU LoongArch CPU + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#include "qemu/osdep.h" +#include "qemu/qemu-print.h" +#include "qapi/error.h" +#include "qemu/module.h" +#include "sysemu/qtest.h" +#include "exec/exec-all.h" +#include "qapi/qapi-commands-machine-target.h" +#include "cpu.h" +#include "internals.h" +#include "fpu/softfloat-helpers.h" + +const char * const regnames[] = { + "r0", "ra", "tp", "sp", "a0", "a1", "a2", "a3", + "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", + "t4", "t5", "t6", "t7", "t8", "x0", "fp", "s0", + "s1", "s2", "s3", "s4", "s5", "s6", "s7", "s8", +}; + +const char * const fregnames[] = { + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", +}; + +static const char * const excp_names[EXCP_LAST + 1] = { + [EXCP_ADE] = "Address error", + [EXCP_SYSCALL] = "Syscall", + [EXCP_BREAK] = "Break", + [EXCP_INE] = "Inst. Not Exist", + [EXCP_FPE] = "Floating Point Exception", +}; + +const char *loongarch_exception_name(int32_t exception) +{ + if (exception < 0 || exception > EXCP_LAST) { + return "unknown"; + } + return excp_names[exception]; +} + +void QEMU_NORETURN do_raise_exception(CPULoongArchState *env, + uint32_t exception, + uintptr_t pc) +{ + CPUState *cs = env_cpu(env); + + qemu_log_mask(CPU_LOG_INT, "%s: %d (%s)\n", + __func__, + exception, + loongarch_exception_name(exception)); + cs->exception_index = exception; + + cpu_loop_exit_restore(cs, pc); +} + +static void loongarch_cpu_set_pc(CPUState *cs, vaddr value) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + + env->pc = value; +} + +#ifdef CONFIG_TCG +static void loongarch_cpu_synchronize_from_tb(CPUState *cs, + const TranslationBlock *tb) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + + env->pc = tb->pc; +} +#endif /* CONFIG_TCG */ + +static bool loongarch_cpu_has_work(CPUState *cs) +{ + return true; +} + +static void set_loongarch_cpucfg(CPULoongArchState *env) +{ + int i; + + for (i = 0; i < 49; i++) { + env->cpucfg[i] = 0x0; + } + env->cpucfg[0] = 0x14c010; + env->cpucfg[1] = 0x3f2f2fe; + env->cpucfg[2] = 0x60c3cf; + env->cpucfg[3] = 0xcff; + env->cpucfg[4] = 0x5f5e100; + env->cpucfg[5] = 0x10001; + env->cpucfg[16] = 0x2c3d; + env->cpucfg[17] = 0x6080003; + env->cpucfg[18] = 0x6080003; + env->cpucfg[19] = 0x60800f; + env->cpucfg[20] = 0x60f000f; +} + +/* LoongArch CPU definitions */ +static void loongarch_3a5000_initfn(Object *obj) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(obj); + CPULoongArchState *env = &cpu->env; + + set_loongarch_cpucfg(env); +} + +static void loongarch_cpu_list_entry(gpointer data, gpointer user_data) +{ + const char *typename = object_class_get_name(OBJECT_CLASS(data)); + + qemu_printf("%s\n", typename); +} + +void loongarch_cpu_list(void) +{ + GSList *list; + list = object_class_get_list_sorted(TYPE_LOONGARCH_CPU, false); + g_slist_foreach(list, loongarch_cpu_list_entry, NULL); + g_slist_free(list); +} + +static void loongarch_cpu_reset(DeviceState *dev) +{ + CPUState *cs = CPU(dev); + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(cpu); + CPULoongArchState *env = &cpu->env; + + lacc->parent_reset(dev); + + set_loongarch_cpucfg(env); + env->fcsr0_mask = 0x1f1f031f; + env->fcsr0 = 0x0; + + cs->exception_index = EXCP_NONE; +} + +static void loongarch_cpu_disas_set_info(CPUState *s, disassemble_info *info) +{ + info->print_insn = print_insn_loongarch; +} + +static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) +{ + CPUState *cs = CPU(dev); + LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(dev); + Error *local_err = NULL; + + cpu_exec_realizefn(cs, &local_err); + if (local_err != NULL) { + error_propagate(errp, local_err); + return; + } + + cpu_reset(cs); + qemu_init_vcpu(cs); + + lacc->parent_realize(dev, errp); +} + +static void loongarch_cpu_initfn(Object *obj) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(obj); + + cpu_set_cpustate_pointers(cpu); +} + +static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) +{ + ObjectClass *oc; + char *typename; + + typename = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model); + oc = object_class_by_name(typename); + g_free(typename); + return oc; +} + +void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + int i; + + qemu_fprintf(f, " PC=%016" PRIx64 " ", env->pc); + qemu_fprintf(f, " FCSR0 0x%08x fp_status 0x%02x\n", env->fcsr0, + get_float_exception_flags(&env->fp_status)); + + /* gpr */ + for (i = 0; i < 32; i++) { + if ((i & 3) == 0) { + qemu_fprintf(f, " GPR%02d:", i); + } + qemu_fprintf(f, " %s %016" PRIx64, regnames[i], env->gpr[i]); + if ((i & 3) == 3) { + qemu_fprintf(f, "\n"); + } + } + + /* fpr */ + if (flags & CPU_DUMP_FPU) { + for (i = 0; i < 32; i++) { + qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i]); + if ((i & 3) == 3) { + qemu_fprintf(f, "\n"); + } + } + } +} + +#ifdef CONFIG_TCG +#include "hw/core/tcg-cpu-ops.h" + +static bool loongarch_cpu_tlb_fill(CPUState *cs, vaddr address, int size, + MMUAccessType access_type, int mmu_idx, + bool probe, uintptr_t retaddr) +{ + LoongArchCPU *cpu = LOONGARCH_CPU(cs); + CPULoongArchState *env = &cpu->env; + + env->badaddr = address; + cs->exception_index = EXCP_ADE; + do_raise_exception(env, cs->exception_index, retaddr); +} + +static struct TCGCPUOps loongarch_tcg_ops = { + .initialize = loongarch_translate_init, + .synchronize_from_tb = loongarch_cpu_synchronize_from_tb, + .tlb_fill = loongarch_cpu_tlb_fill, +}; +#endif /* CONFIG_TCG */ + +static void loongarch_cpu_class_init(ObjectClass *c, void *data) +{ + LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c); + CPUClass *cc = CPU_CLASS(c); + DeviceClass *dc = DEVICE_CLASS(c); + + device_class_set_parent_realize(dc, loongarch_cpu_realizefn, + &lacc->parent_realize); + device_class_set_parent_reset(dc, loongarch_cpu_reset, &lacc->parent_reset); + + cc->class_by_name = loongarch_cpu_class_by_name; + cc->has_work = loongarch_cpu_has_work; + cc->dump_state = loongarch_cpu_dump_state; + cc->set_pc = loongarch_cpu_set_pc; + cc->disas_set_info = loongarch_cpu_disas_set_info; +#ifdef CONFIG_TCG + cc->tcg_ops = &loongarch_tcg_ops; +#endif +} + +#define DEFINE_LOONGARCH_CPU_TYPE(model, initfn) \ + { \ + .parent = TYPE_LOONGARCH_CPU, \ + .instance_init = initfn, \ + .name = LOONGARCH_CPU_TYPE_NAME(model), \ + } + +static const TypeInfo loongarch_cpu_type_infos[] = { + { + .name = TYPE_LOONGARCH_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(LoongArchCPU), + .instance_init = loongarch_cpu_initfn, + + .abstract = true, + .class_size = sizeof(LoongArchCPUClass), + .class_init = loongarch_cpu_class_init, + }, + DEFINE_LOONGARCH_CPU_TYPE("Loongson-3A5000", loongarch_3a5000_initfn), +}; + +DEFINE_TYPES(loongarch_cpu_type_infos) diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h new file mode 100644 index 0000000..a4991f9 --- /dev/null +++ b/target/loongarch/cpu.h @@ -0,0 +1,151 @@ +/* + * QEMU LoongArch CPU + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_CPU_H +#define LOONGARCH_CPU_H + +#include "exec/cpu-defs.h" +#include "fpu/softfloat-types.h" +#include "hw/registerfields.h" + +#define TCG_GUEST_DEFAULT_MO (0) + +#define FCSR0_M1 0x1f /* FCSR1 mask, Enables */ +#define FCSR0_M2 0x1f1f0000 /* FCSR2 mask, Cause and Flags */ +#define FCSR0_M3 0x300 /* FCSR3 mask, Round Mode */ +#define FCSR0_RM 8 /* Round Mode bit num on fcsr0 */ + +FIELD(FCSR0, ENABLES, 0, 5) +FIELD(FCSR0, RM, 8, 2) +FIELD(FCSR0, FLAGS, 16, 5) +FIELD(FCSR0, CAUSE, 24, 5) + +#define GET_FP_CAUSE(REG) FIELD_EX32(REG, FCSR0, CAUSE) +#define SET_FP_CAUSE(REG, V) FIELD_DP32(REG, FCSR0, CAUSE, V) +#define GET_FP_ENABLES(REG) FIELD_EX32(REG, FCSR0, ENABLES) +#define SET_FP_ENABLES(REG, V) FIELD_DP32(REG, FCSR0, ENABLES, V) +#define GET_FP_FLAGS(REG) FIELD_EX32(REG, FCSR0, FLAGS) +#define SET_FP_FLAGS(REG, V) FIELD_DP32(REG, FCSR0, FLAGS, V) +#define UPDATE_FP_FLAGS(REG, V) \ + do { \ + (REG) |= FIELD_DP32(0, FCSR0, FLAGS, V); \ + } while (0) + +#define FP_INEXACT 1 +#define FP_UNDERFLOW 2 +#define FP_OVERFLOW 4 +#define FP_DIV0 8 +#define FP_INVALID 16 + +extern const char * const regnames[]; +extern const char * const fregnames[]; + +typedef struct CPULoongArchState CPULoongArchState; +struct CPULoongArchState { + uint64_t gpr[32]; + uint64_t pc; + + uint64_t fpr[32]; + float_status fp_status; + bool cf[8]; + + /* + * fcsr0 + * 31:29 |28:24 |23:21 |20:16 |15:10 |9:8 |7:5 |4:0 + * Cause Flags RM Enables + */ + uint32_t fcsr0; + uint32_t fcsr0_mask; + + uint32_t cpucfg[49]; + + uint64_t lladdr; /* LL virtual address compared against SC */ + uint64_t llval; + + uint64_t badaddr; +}; + +/** + * LoongArchCPU: + * @env: #CPULoongArchState + * + * A LoongArch CPU. + */ +struct LoongArchCPU { + /*< private >*/ + CPUState parent_obj; + /*< public >*/ + + CPUNegativeOffsetState neg; + CPULoongArchState env; +}; + +#define TYPE_LOONGARCH_CPU "loongarch64-cpu" + +OBJECT_DECLARE_TYPE(LoongArchCPU, LoongArchCPUClass, + LOONGARCH_CPU) + +/** + * LoongArchCPUClass: + * @parent_realize: The parent class' realize handler. + * @parent_reset: The parent class' reset handler. + * + * A LoongArch CPU model. + */ +struct LoongArchCPUClass { + /*< private >*/ + CPUClass parent_class; + /*< public >*/ + + DeviceRealize parent_realize; + DeviceReset parent_reset; +}; + +static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, + target_ulong *pc, + target_ulong *cs_base, + uint32_t *flags) +{ + *pc = env->pc; + *cs_base = 0; + *flags = 0; +} + +void loongarch_cpu_list(void); + +#define cpu_list loongarch_cpu_list + +#define MMU_USER_IDX 3 + +static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch) +{ + return MMU_USER_IDX; +} + +typedef CPULoongArchState CPUArchState; +typedef LoongArchCPU ArchCPU; + +#include "exec/cpu-all.h" + +/* Exceptions */ +enum { + EXCP_NONE = -1, + EXCP_ADE = 0, + EXCP_SYSCALL, + EXCP_BREAK, + EXCP_INE, + EXCP_FPE, + + EXCP_LAST = EXCP_FPE, +}; + +#define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU +#define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX +#define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU + +#endif /* LOONGARCH_CPU_H */ diff --git a/target/loongarch/internals.h b/target/loongarch/internals.h new file mode 100644 index 0000000..cfb08df --- /dev/null +++ b/target/loongarch/internals.h @@ -0,0 +1,23 @@ +/* + * QEMU LoongArch CPU -- internal functions and types + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +#ifndef LOONGARCH_INTERNALS_H +#define LOONGARCH_INTERNALS_H + + +void loongarch_translate_init(void); + +void loongarch_cpu_dump_state(CPUState *cpu, FILE *f, int flags); + +void QEMU_NORETURN do_raise_exception(CPULoongArchState *env, + uint32_t exception, + uintptr_t pc); + +const char *loongarch_exception_name(int32_t exception); + +#endif