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foc: add support to add ACPI rsdp in platform info

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which is required for UEFI boots.

Issue #5406
This commit is contained in:
Alexander Boettcher 2024-12-12 23:31:02 +01:00 committed by Christian Helmuth
parent 1a0a1b3f27
commit 8a5fd27b46
1 changed files with 79 additions and 1 deletions
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80
repos/base-foc/src/core/platform.cc
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@ -18,6 +18,7 @@
#include <dataspace/capability.h>
#include <trace/source_registry.h>
#include <util/misc_math.h>
#include <util/mmio.h>
#include <util/xml_generator.h>
/* base-internal includes */
@ -342,6 +343,76 @@ void Core::Platform::_setup_irq_alloc()
}
struct Acpi_rsdp : public Genode::Mmio<32>
{
using Mmio<32>::Mmio;
struct Signature : Register< 0, 64> { };
struct Revision : Register<15, 8> { };
struct Rsdt : Register<16, 32> { };
struct Length : Register<20, 32> { };
struct Xsdt : Register<24, 64> { };
bool valid() const
{
const char sign[] = "RSD PTR ";
return read<Signature>() == *(Genode::uint64_t *)sign;
}
} __attribute__((packed));
static void add_acpi_rsdp(auto &region_alloc, auto &xml)
{
using namespace Foc;
using Foc::L4::Kip::Mem_desc;
l4_kernel_info_t const &kip = sigma0_map_kip();
Mem_desc const * const desc = Mem_desc::first(&kip);
if (!desc)
return;
for (unsigned i = 0; i < Mem_desc::count(&kip); ++i) {
if (desc[i].type() != Mem_desc::Mem_type::Info ||
desc[i].sub_type() != Mem_desc::Info_sub_type::Info_acpi_rsdp)
continue;
auto offset = desc[i].start() & 0xffful;
auto pages = align_addr(offset + desc[i].size(), 12) >> 12;
region_alloc.alloc_aligned(pages * 4096, 12).with_result([&] (void *core_local_ptr) {
if (!map_local_io(desc[i].start(), (addr_t)core_local_ptr, pages))
return;
Byte_range_ptr const ptr((char *)(addr_t(core_local_ptr) + offset),
pages * 4096 - offset);
auto const rsdp = Acpi_rsdp(ptr);
if (!rsdp.valid())
return;
xml.node("acpi", [&] {
xml.attribute("revision", rsdp.read<Acpi_rsdp::Revision>());
if (rsdp.read<Acpi_rsdp::Rsdt>())
xml.attribute("rsdt", String<32>(Hex(rsdp.read<Acpi_rsdp::Rsdt>())));
if (rsdp.read<Acpi_rsdp::Xsdt>())
xml.attribute("xsdt", String<32>(Hex(rsdp.read<Acpi_rsdp::Xsdt>())));
});
unmap_local(addr_t(core_local_ptr), pages);
region_alloc.free(core_local_ptr);
pages = 0;
}, [&] (Range_allocator::Alloc_error) { });
if (!pages)
return;
}
}
void Core::Platform::_setup_basics()
{
using namespace Foc;
@ -412,6 +483,10 @@ void Core::Platform::_setup_basics()
/* image is accessible by core */
add_region(Region(img_start, img_end), _core_address_ranges());
/* requested as I/O memory by the VESA driver and ACPI (rsdp search) */
_io_mem_alloc.add_range (0, 0x2000);
ram_alloc() .remove_range(0, 0x2000);
}
@ -517,7 +592,10 @@ Core::Platform::Platform()
xml.node("affinity-space", [&] {
xml.attribute("width", affinity_space().width());
xml.attribute("height", affinity_space().height()); });
xml.attribute("height", affinity_space().height());
});
add_acpi_rsdp(region_alloc(), xml);
});
}
);