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target-i386: move check_io helpers to seg_helper.c

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Prepare for adding _kernel accessors there in the next patch.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-03-28 18:47:57 +01:00
parent 43773ed369
commit 81cf8d8adc
2 changed files with 42 additions and 42 deletions
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42
target-i386/misc_helper.c
View File

@ -22,48 +22,6 @@
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
/* check if Port I/O is allowed in TSS */
static inline void check_io(CPUX86State *env, int addr, int size)
{
int io_offset, val, mask;
/* TSS must be a valid 32 bit one */
if (!(env->tr.flags & DESC_P_MASK) ||
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
env->tr.limit < 103) {
goto fail;
}
io_offset = cpu_lduw_kernel(env, env->tr.base + 0x66);
io_offset += (addr >> 3);
/* Note: the check needs two bytes */
if ((io_offset + 1) > env->tr.limit) {
goto fail;
}
val = cpu_lduw_kernel(env, env->tr.base + io_offset);
val >>= (addr & 7);
mask = (1 << size) - 1;
/* all bits must be zero to allow the I/O */
if ((val & mask) != 0) {
fail:
raise_exception_err(env, EXCP0D_GPF, 0);
}
}
void helper_check_iob(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 1);
}
void helper_check_iow(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 2);
}
void helper_check_iol(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 4);
}
void helper_outb(uint32_t port, uint32_t data)
{
cpu_outb(port, data & 0xff);

42
target-i386/seg_helper.c
View File

@ -2469,3 +2469,45 @@ void cpu_x86_load_seg(CPUX86State *env, int seg_reg, int selector)
}
}
#endif
/* check if Port I/O is allowed in TSS */
static inline void check_io(CPUX86State *env, int addr, int size)
{
int io_offset, val, mask;
/* TSS must be a valid 32 bit one */
if (!(env->tr.flags & DESC_P_MASK) ||
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
env->tr.limit < 103) {
goto fail;
}
io_offset = cpu_lduw_kernel(env, env->tr.base + 0x66);
io_offset += (addr >> 3);
/* Note: the check needs two bytes */
if ((io_offset + 1) > env->tr.limit) {
goto fail;
}
val = cpu_lduw_kernel(env, env->tr.base + io_offset);
val >>= (addr & 7);
mask = (1 << size) - 1;
/* all bits must be zero to allow the I/O */
if ((val & mask) != 0) {
fail:
raise_exception_err(env, EXCP0D_GPF, 0);
}
}
void helper_check_iob(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 1);
}
void helper_check_iow(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 2);
}
void helper_check_iol(CPUX86State *env, uint32_t t0)
{
check_io(env, t0, 4);
}