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acpica: improve faked RSDP

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More sane table values fix broken output on verbose.

Issue #5083
This commit is contained in:
Christian Helmuth 2024-01-03 16:49:03 +01:00
parent 980793970d
commit c2e1013ad4
1 changed files with 12 additions and 2 deletions
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14
repos/libports/src/lib/acpica/iomem.cc
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@ -27,6 +27,8 @@
extern "C" {
#include "acpi.h"
#include "acpiosxf.h"
#include "accommon.h"
#include "actables.h"
}
#define FAIL(retval) \
@ -382,13 +384,21 @@ ACPI_PHYSICAL_ADDRESS AcpiOsGetRootPointer (void)
/* try platform_info ROM provided by core */
try {
Genode::Attached_rom_dataspace info(env, "platform_info");
Genode::Xml_node xml(info.local_addr<char>(), info.size());
Genode::Xml_node acpi_node = xml.sub_node("acpi");
Genode::Xml_node acpi_node = info.xml().sub_node("acpi");
using Genode::memcpy;
ACPI_MAKE_RSDP_SIG(faked_rsdp.Signature);
memcpy(faked_rsdp.OemId, "Faked", 6);
faked_rsdp.Checksum = 0;
faked_rsdp.Revision = acpi_node.attribute_value("revision", 0U);
faked_rsdp.RsdtPhysicalAddress = acpi_node.attribute_value("rsdt", 0UL);
faked_rsdp.Length = sizeof(ACPI_TABLE_RSDP);
faked_rsdp.XsdtPhysicalAddress = acpi_node.attribute_value("xsdt", 0UL);
/* update checksum */
faked_rsdp.Checksum = (UINT8) -AcpiTbChecksum((UINT8 *)&faked_rsdp, ACPI_RSDP_CHECKSUM_LENGTH);
if (faked_rsdp.XsdtPhysicalAddress || faked_rsdp.RsdtPhysicalAddress)
return FAKED_PHYS_RSDP_ADDR;
} catch (...) { }