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acpi: add aml_io() helper

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Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-02-18 19:14:32 +00:00 • committed by Michael S. Tsirkin
parent ad4a80bc6f
commit 52fa397c58
2 changed files with 23 additions and 0 deletions
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16
hw/acpi/aml-build.c
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@ -478,6 +478,22 @@ Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2, Aml *arg3, Aml *arg4)
return var;
}
/* ACPI 1.0b: 6.4.2.5 I/O Port Descriptor */
Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
uint8_t aln, uint8_t len)
{
Aml *var = aml_alloc();
build_append_byte(var->buf, 0x47); /* IO port descriptor */
build_append_byte(var->buf, dec);
build_append_byte(var->buf, min_base & 0xff);
build_append_byte(var->buf, (min_base >> 8) & 0xff);
build_append_byte(var->buf, max_base & 0xff);
build_append_byte(var->buf, (max_base >> 8) & 0xff);
build_append_byte(var->buf, aln);
build_append_byte(var->buf, len);
return var;
}
/* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefIfElse */
Aml *aml_if(Aml *predicate)
{