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unicore32-softmmu: Make UniCore32 cpuid & exceptions correct and runable 

This patch initializes the cpuid to exactly correct value because
linux kernel will check it.
In addition, the exception types are specified in proper situations.
Then it could make exceptions generated correctly and timely.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Guan Xuetao 2012-08-10 14:42:23 +08:00 committed by Blue Swirl
parent 527d9979b4
commit d48813dd76
4 changed files with 25 additions and 12 deletions
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1
cpu-exec.c
View File

@ -444,6 +444,7 @@ int cpu_exec(CPUArchState *env)
#elif defined(TARGET_UNICORE32)
if (interrupt_request & CPU_INTERRUPT_HARD
&& !(env->uncached_asr & ASR_I)) {
env->exception_index = UC32_EXCP_INTR;
do_interrupt(env);
next_tb = 0;
}

3
linux-user/main.c
View File

@ -958,7 +958,8 @@ void cpu_loop(CPUUniCore32State *env)
}
}
break;
case UC32_EXCP_TRAP:
case UC32_EXCP_DTRAP:
case UC32_EXCP_ITRAP:
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */

19
target-unicore32/cpu.c
View File

@ -1,7 +1,7 @@
/*
* QEMU UniCore32 CPU
*
* Copyright (c) 2010-2011 GUAN Xue-tao
* Copyright (c) 2010-2012 Guan Xuetao
* Copyright (c) 2012 SUSE LINUX Products GmbH
*
* This program is free software; you can redistribute it and/or modify
@ -32,13 +32,16 @@ static void unicore_ii_cpu_initfn(Object *obj)
UniCore32CPU *cpu = UNICORE32_CPU(obj);
CPUUniCore32State *env = &cpu->env;
env->cp0.c0_cpuid = 0x40010863;
env->cp0.c0_cpuid = 0x4d000863;
env->cp0.c0_cachetype = 0x0d152152;
env->cp0.c1_sys = 0x2000;
env->cp0.c2_base = 0x0;
env->cp0.c3_faultstatus = 0x0;
env->cp0.c4_faultaddr = 0x0;
env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
set_feature(env, UC32_HWCAP_CMOV);
set_feature(env, UC32_HWCAP_UCF64);
env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
env->cp0.c0_cachetype = 0x1dd20d2;
env->cp0.c1_sys = 0x00090078;
}
static void uc32_any_cpu_initfn(Object *obj)
@ -47,6 +50,7 @@ static void uc32_any_cpu_initfn(Object *obj)
CPUUniCore32State *env = &cpu->env;
env->cp0.c0_cpuid = 0xffffffff;
env->ucf64.xregs[UC32_UCF64_FPSCR] = 0;
set_feature(env, UC32_HWCAP_CMOV);
set_feature(env, UC32_HWCAP_UCF64);
@ -65,8 +69,13 @@ static void uc32_cpu_initfn(Object *obj)
cpu_exec_init(env);
env->cpu_model_str = object_get_typename(obj);
#ifdef CONFIG_USER_ONLY
env->uncached_asr = ASR_MODE_USER;
env->regs[31] = 0;
#else
env->uncached_asr = ASR_MODE_PRIV;
env->regs[31] = 0x03000000;
#endif
tlb_flush(env, 1);
}

14
target-unicore32/cpu.h
View File

@ -1,15 +1,15 @@
/*
* UniCore32 virtual CPU header
*
* Copyright (C) 2010-2011 GUAN Xue-tao
* Copyright (C) 2010-2012 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation, or (at your option) any
* later version. See the COPYING file in the top-level directory.
*/
#ifndef __CPU_UC32_H__
#define __CPU_UC32_H__
#ifndef QEMU_UNICORE32_CPU_H
#define QEMU_UNICORE32_CPU_H
#define TARGET_LONG_BITS 32
#define TARGET_PAGE_BITS 12
@ -89,8 +89,10 @@ typedef struct CPUUniCore32State {
#define ASR_NZCV (ASR_N | ASR_Z | ASR_C | ASR_V)
#define ASR_RESERVED (~(ASR_M | ASR_I | ASR_NZCV))
#define UC32_EXCP_PRIV (ASR_MODE_PRIV)
#define UC32_EXCP_TRAP (ASR_MODE_TRAP)
#define UC32_EXCP_PRIV (1)
#define UC32_EXCP_ITRAP (2)
#define UC32_EXCP_DTRAP (3)
#define UC32_EXCP_INTR (4)
/* Return the current ASR value. */
target_ulong cpu_asr_read(CPUUniCore32State *env1);
@ -189,4 +191,4 @@ static inline bool cpu_has_work(CPUUniCore32State *env)
(CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
}
#endif /* __CPU_UC32_H__ */
#endif /* QEMU_UNICORE32_CPU_H */