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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#include <BootKit/BootKit.h>
#include <BootKit/BootThread.h>
#include <FirmwareKit/EFI.h>
#include <FirmwareKit/EFI/API.h>
#include <FirmwareKit/Handover.h>
#include <KernelKit/MSDOS.h>
#include <KernelKit/PE.h>
#include <KernelKit/PEF.h>
#include <NeKit/Macros.h>
#include <NeKit/Ref.h>
#include <modules/CoreGfx/CoreGfx.h>
#include <modules/CoreGfx/TextGfx.h>
#ifndef kExpectedWidth
#define kExpectedWidth (800)
#endif
#ifndef kExpectedHeight
#define kExpectedHeight (600)
#endif
/** Graphics related. */
STATIC EfiGraphicsOutputProtocol* kGop = nullptr;
STATIC UInt16 kGopStride = 0U;
STATIC EFI_GUID kGopGuid;
EXTERN_C Void rt_reset_hardware();
EXTERN EfiBootServices* BS;
/**
@brief Finds and stores the GOP object.
*/
STATIC Bool boot_init_fb() noexcept {
kGopGuid = EFI_GUID(EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID);
kGop = nullptr;
if (BS->LocateProtocol(&kGopGuid, nullptr, (VoidPtr*) &kGop) != kEfiOk) return No;
kGopStride = 4;
for (SizeT i = 0; i < kGop->Mode->MaxMode; ++i) {
EfiGraphicsOutputProtocolModeInformation* infoPtr = nullptr;
UInt32 sz = 0U;
kGop->QueryMode(kGop, i, &sz, &infoPtr);
if (infoPtr->HorizontalResolution == kExpectedWidth &&
infoPtr->VerticalResolution == kExpectedHeight) {
kGop->SetMode(kGop, i);
return Yes;
}
}
return No;
}
EXTERN EfiBootServices* BS;
/// @brief BootloaderMain EFI entrypoint.
/// @param image_handle Handle of this image.
/// @param sys_table The system table of it.
/// @return nothing, never returns.
EFI_EXTERN_C EFI_API Int32 BootloaderMain(EfiHandlePtr image_handle, EfiSystemTable* sys_table) {
fw_init_efi(sys_table); ///! Init the EFI library.
kHandoverHeader = new HEL::BootInfoHeader();
#ifdef ZBA_USE_FB
if (!boot_init_fb()) return kEfiFail; ///! Init the GOP.
for (SizeT index_vt = 0; index_vt < sys_table->NumberOfTableEntries; ++index_vt) {
Char* vendor_table =
reinterpret_cast<Char*>(sys_table->ConfigurationTable[index_vt].VendorTable);
// ACPI's 'RSD PTR', which contains the ACPI SDT (MADT, FACP...)
if (vendor_table[0] == 'R' && vendor_table[1] == 'S' && vendor_table[2] == 'D' &&
vendor_table[3] == ' ' && vendor_table[4] == 'P' && vendor_table[5] == 'T' &&
vendor_table[6] == 'R' && vendor_table[7] == ' ') {
kHandoverHeader->f_HardwareTables.f_VendorPtr = (VoidPtr) vendor_table;
break;
}
}
// ------------------------------------------ //
// draw background color.
// ------------------------------------------ //
kHandoverHeader->f_GOP.f_The = kGop->Mode->FrameBufferBase;
kHandoverHeader->f_GOP.f_Width = kGop->Mode->Info->VerticalResolution;
kHandoverHeader->f_GOP.f_Height = kGop->Mode->Info->HorizontalResolution;
kHandoverHeader->f_GOP.f_PixelPerLine = kGop->Mode->Info->PixelsPerScanLine;
kHandoverHeader->f_GOP.f_PixelFormat = kGop->Mode->Info->PixelFormat;
kHandoverHeader->f_GOP.f_Size = kGop->Mode->FrameBufferSize;
#endif // ZBA_USE_FB
// ------------------------------------------- //
// Grab MP services, extended to runtime. //
// ------------------------------------------- //
EFI_GUID guid_mp = EFI_GUID(EFI_MP_SERVICES_PROTOCOL_GUID);
EfiMpServicesProtocol* mp = nullptr;
BS->LocateProtocol(&guid_mp, nullptr, reinterpret_cast<VoidPtr*>(&mp));
kHandoverHeader->f_HardwareTables.f_MpPtr = reinterpret_cast<VoidPtr>(mp);
UInt32 cnt_enabled = 0;
UInt32 cnt_disabled = 0;
if (mp) {
mp->GetNumberOfProcessors(mp, &cnt_disabled, &cnt_enabled);
kHandoverHeader->f_HardwareTables.f_MultiProcessingEnabled = cnt_enabled > 1;
} else {
kHandoverHeader->f_HardwareTables.f_MultiProcessingEnabled = NO;
}
//-------------------------------------------------------------//
// Allocate heap.
//-------------------------------------------------------------//
Boot::BootTextWriter writer;
kHandoverHeader->f_BitMapStart = nullptr; /* Start of bitmap. */
kHandoverHeader->f_BitMapSize = kHandoverBitMapSz; /* Size of bitmap in bytes. */
UInt16 trials = 5;
while (BS->AllocatePool(EfiLoaderData, kHandoverHeader->f_BitMapSize,
&kHandoverHeader->f_BitMapStart) != kEfiOk) {
--trials;
if (!trials) {
writer.Write("BootZ: Unable to allocate sufficient memory, trying again with 2GB...\r");
trials = 3;
kHandoverHeader->f_BitMapSize = kHandoverBitMapSz / 2; /* Size of bitmap in bytes. */
while (BS->AllocatePool(EfiLoaderData, kHandoverHeader->f_BitMapSize,
&kHandoverHeader->f_BitMapStart) != kEfiOk) {
--trials;
if (!trials) {
writer.Write("BootZ: Unable to allocate sufficient memory, aborting...\r");
Boot::Stop();
}
}
}
}
// ------------------------------------------ //
// null these fields, to avoid being reused later.
// ------------------------------------------ //
kHandoverHeader->f_FirmwareCustomTables[0] = nullptr;
kHandoverHeader->f_FirmwareCustomTables[1] = nullptr;
kHandoverHeader->f_FirmwareVendorLen = Boot::BStrLen(sys_table->FirmwareVendor);
kHandoverHeader->f_Magic = kHandoverMagic;
kHandoverHeader->f_Version = kHandoverVersion;
// Provide fimware vendor name.
Boot::BCopyMem(kHandoverHeader->f_FirmwareVendorName, sys_table->FirmwareVendor,
kHandoverHeader->f_FirmwareVendorLen);
kHandoverHeader->f_FirmwareVendorLen = Boot::BStrLen(sys_table->FirmwareVendor);
Boot::BootFileReader reader_kernel(L"ne_kernel", image_handle);
reader_kernel.ReadAll(0);
// ------------------------------------------ //
// If we succeed in reading the blob, then execute it.
// ------------------------------------------ //
if (reader_kernel.Blob()) {
auto kernel_thread = Boot::BootThread(reader_kernel.Blob());
kernel_thread.SetName("NeKernel");
kHandoverHeader->f_KernelImage = reader_kernel.Blob();
kHandoverHeader->f_KernelSz = reader_kernel.Size();
kernel_thread.Start(kHandoverHeader, YES);
}
CANT_REACH();
}
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