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sel4: add mbi2 framebuffer support

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Issue #2555
This commit is contained in:
Alexander Boettcher 2017-11-18 14:17:11 +01:00 committed by Christian Helmuth
parent e87f63944f
commit 2b6ae514b5
4 changed files with 193 additions and 16 deletions
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146
repos/base-sel4/patches/uefi_fb.patch Normal file
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@ -0,0 +1,146 @@
--- src/kernel/sel4/include/arch/x86/arch/kernel/boot.h
+++ src/kernel/sel4/include/arch/x86/arch/kernel/boot.h
@@ -42,7 +42,8 @@ bool_t init_sys_state(
acpi_rmrr_list_t *rmrr_list,
acpi_rsdp_t *acpi_rsdp,
seL4_X86_BootInfo_VBE *vbe,
- seL4_X86_BootInfo_mmap_t *mb_mmap
+ seL4_X86_BootInfo_mmap_t *mb_mmap,
+ seL4_X86_BootInfo_fb_t *fb_info
);
bool_t init_cpu(
--- src/kernel/sel4/include/arch/x86/arch/kernel/multiboot2.h
+++ src/kernel/sel4/include/arch/x86/arch/kernel/multiboot2.h
@@ -38,11 +38,21 @@
char string [1];
} PACKED multiboot2_module_t;
+typedef struct multiboot2_fb {
+ uint64_t addr;
+ uint32_t pitch;
+ uint32_t width;
+ uint32_t height;
+ uint8_t bpp;
+ uint8_t type;
+} PACKED multiboot2_fb_t;
+
enum multiboot2_tags {
MULTIBOOT2_TAG_END = 0,
MULTIBOOT2_TAG_CMDLINE = 1,
MULTIBOOT2_TAG_MODULE = 3,
MULTIBOOT2_TAG_MEMORY = 6,
+ MULTIBOOT2_TAG_FB = 8,
MULTIBOOT2_TAG_ACPI_1 = 14,
MULTIBOOT2_TAG_ACPI_2 = 15,
};
--- src/kernel/sel4/libsel4/arch_include/x86/sel4/arch/bootinfo_types.h
+++ src/kernel/sel4/libsel4/arch_include/x86/sel4/arch/bootinfo_types.h
@@ -135,4 +135,6 @@ typedef struct seL4_X86_BootInfo_mmap {
seL4_X86_mb_mmap_t mmap[SEL4_MULTIBOOT_MAX_MMAP_ENTRIES];
} SEL4_PACKED seL4_X86_BootInfo_mmap_t;
+typedef struct multiboot2_fb seL4_X86_BootInfo_fb_t;
+
#endif // __LIBSEL4_ARCH_BOOTINFO_TYPES_H
--- src/kernel/sel4/libsel4/include/sel4/bootinfo_types.h
+++ src/kernel/sel4/libsel4/include/sel4/bootinfo_types.h
@@ -88,5 +88,6 @@ typedef struct {
#define SEL4_BOOTINFO_HEADER_X86_VBE 1
#define SEL4_BOOTINFO_HEADER_X86_MBMMAP 2
#define SEL4_BOOTINFO_HEADER_X86_ACPI_RSDP 3
+#define SEL4_BOOTINFO_HEADER_X86_FRAMEBUFFER 4
#endif // __LIBSEL4_BOOTINFO_TYPES_H
--- src/kernel/sel4/src/arch/x86/kernel/boot.c
+++ src/kernel/sel4/src/arch/x86/kernel/boot.c
@@ -253,7 +253,8 @@ init_sys_state(
acpi_rmrr_list_t *rmrr_list,
acpi_rsdp_t *acpi_rsdp,
seL4_X86_BootInfo_VBE *vbe,
- seL4_X86_BootInfo_mmap_t *mb_mmap
+ seL4_X86_BootInfo_mmap_t *mb_mmap,
+ seL4_X86_BootInfo_fb_t *fb_info
)
{
cap_t root_cnode_cap;
@@ -287,6 +288,12 @@ init_sys_state(
if (vbe->vbeMode != -1) {
extra_bi_size += sizeof(seL4_X86_BootInfo_VBE);
}
+ if (acpi_rsdp) {
+ extra_bi_size += sizeof(seL4_BootInfoHeader) + sizeof(*acpi_rsdp);
+ }
+ if (fb_info && fb_info->addr) {
+ extra_bi_size += sizeof(seL4_BootInfoHeader) + sizeof(*fb_info);
+ }
word_t mb_mmap_size = sizeof(seL4_X86_BootInfo_mmap_t);
extra_bi_size += mb_mmap_size;
@@ -353,6 +360,17 @@ init_sys_state(
extra_bi_offset += sizeof(*acpi_rsdp);
}
+ /* populate framebuffer information block */
+ if (fb_info && fb_info->addr) {
+ seL4_BootInfoHeader header;
+ header.id = SEL4_BOOTINFO_HEADER_X86_FRAMEBUFFER;
+ header.len = sizeof(header) + sizeof(*fb_info);
+ *(seL4_BootInfoHeader*)(extra_bi_region.start + extra_bi_offset) = header;
+ extra_bi_offset += sizeof(header);
+ memcpy((void*)(extra_bi_region.start + extra_bi_offset), fb_info, sizeof(*fb_info));
+ extra_bi_offset += sizeof(*fb_info);
+ }
+
/* populate multiboot mmap block */
mb_mmap->header.id = SEL4_BOOTINFO_HEADER_X86_MBMMAP;
mb_mmap->header.len = mb_mmap_size;
--- src/kernel/sel4/src/arch/x86/kernel/boot_sys.c
+++ src/kernel/sel4/src/arch/x86/kernel/boot_sys.c
@@ -71,6 +71,7 @@ typedef struct boot_state {
mem_p_regs_t mem_p_regs; /* physical memory regions */
seL4_X86_BootInfo_VBE vbe_info; /* Potential VBE information from multiboot */
seL4_X86_BootInfo_mmap_t mb_mmap_info; /* memory map information from multiboot */
+ seL4_X86_BootInfo_fb_t fb_info; /* framebuffer information as set by bootloader */
} boot_state_t;
BOOT_BSS
@@ -229,7 +230,8 @@ try_boot_sys_node(cpu_id_t cpu_id)
&boot_state.rmrr_list,
&boot_state.acpi_rsdp,
&boot_state.vbe_info,
- &boot_state.mb_mmap_info
+ &boot_state.mb_mmap_info,
+ &boot_state.fb_info
)) {
return false;
}
@@ -644,6 +646,7 @@ try_boot_sys_mbi2(
boot_state.mem_p_regs.count = 0;
init_allocated_p_regions();
boot_state.mb_mmap_info.mmap_length = 0;
+ boot_state.vbe_info.vbeMode = -1;
while (tag < tag_e && tag->type != MULTIBOOT2_TAG_END) {
word_t const behind_tag = (word_t)tag + sizeof(*tag);
@@ -701,6 +706,11 @@ try_boot_sys_mbi2(
return false;
}
}
+ } else if (tag->type == MULTIBOOT2_TAG_FB) {
+ multiboot2_fb_t const * fb = (multiboot2_fb_t const *)behind_tag;
+ printf("Got framebuffer info in multiboot2. Current video mode is at physical address=%llx pitch=%u resolution=%ux%u@%u type=%u\n",
+ fb->addr, fb->pitch, fb->width, fb->height, fb->bpp, fb->type);
+ boot_state.fb_info = *fb;
}
tag = (multiboot2_tag_t const *)((word_t)tag + ROUND_UP(tag->size, 3));
@@ -713,8 +723,6 @@ try_boot_sys_mbi2(
return false;
}
- boot_state.vbe_info.vbeMode = -1;
-
return true;
}

2
repos/base-sel4/ports/sel4.hash
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@ -1 +1 @@
a6a9f6b6e79e9628419a18432fb3d1e6fd0c95f3
097171f475bff21223783e130445b9be6b3d1bb4

59
repos/base-sel4/src/core/platform.cc
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@ -376,24 +376,53 @@ void Platform::_init_rom_modules()
Genode::Xml_generator xml(reinterpret_cast<char *>(virt_addr),
rom_size, rom_name, [&] ()
{
xml.node("acpi", [&] () {
if (!bi.extraLen)
return;
if (!bi.extraLen)
return;
addr_t const boot_info_page = reinterpret_cast<addr_t>(&bi);
addr_t const boot_info_extra = boot_info_page + 4096;
addr_t const boot_info_page = reinterpret_cast<addr_t>(&bi);
addr_t const boot_info_extra = boot_info_page + 4096;
seL4_BootInfoHeader const * element = reinterpret_cast<seL4_BootInfoHeader *>(boot_info_extra);
seL4_BootInfoHeader const * const last = reinterpret_cast<seL4_BootInfoHeader const * const>(boot_info_extra + bi.extraLen);
seL4_BootInfoHeader const * element = reinterpret_cast<seL4_BootInfoHeader *>(boot_info_extra);
seL4_BootInfoHeader const * const last = reinterpret_cast<seL4_BootInfoHeader const * const>(boot_info_extra + bi.extraLen);
for (seL4_BootInfoHeader const *next = nullptr;
(next = reinterpret_cast<seL4_BootInfoHeader const *>(reinterpret_cast<addr_t>(element) + element->len)) &&
next <= last && element->id != SEL4_BOOTINFO_HEADER_PADDING;
element = next)
{
if (element->id == SEL4_BOOTINFO_HEADER_X86_FRAMEBUFFER) {
struct mbi2_framebuffer {
uint64_t addr;
uint32_t pitch;
uint32_t width;
uint32_t height;
uint8_t bpp;
uint8_t type;
} __attribute__((packed));
for (seL4_BootInfoHeader const *next = nullptr;
(next = reinterpret_cast<seL4_BootInfoHeader const *>(reinterpret_cast<addr_t>(element) + element->len)) &&
next <= last && element->id != SEL4_BOOTINFO_HEADER_PADDING;
element = next)
{
if (element->id != SEL4_BOOTINFO_HEADER_X86_ACPI_RSDP)
if (sizeof(mbi2_framebuffer) + sizeof(*element) != element->len) {
error("unexpected framebuffer information format");
continue;
}
mbi2_framebuffer const * boot_fb = reinterpret_cast<mbi2_framebuffer const *>(reinterpret_cast<addr_t>(element) + sizeof(*element));
xml.node("boot", [&] () {
xml.node("framebuffer", [&] () {
xml.attribute("phys", String<32>(Hex(boot_fb->addr)));
xml.attribute("width", boot_fb->width);
xml.attribute("height", boot_fb->height);
xml.attribute("bpp", boot_fb->bpp);
xml.attribute("type", boot_fb->type);
xml.attribute("pitch", boot_fb->pitch);
});
});
}
if (element->id != SEL4_BOOTINFO_HEADER_X86_ACPI_RSDP)
continue;
xml.node("acpi", [&] () {
struct Acpi_rsdp
{
@ -422,8 +451,8 @@ void Platform::_init_rom_modules()
if (rsdp->xsdt)
xml.attribute("xsdt", String<32>(Hex(rsdp->xsdt)));
}
}
});
});
}
});
if (!unmap_local(virt_addr, pages, this)) {

2
tool/run/boot_dir/sel4
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@ -74,6 +74,8 @@ proc run_boot_dir {binaries} {
#
set fh [open "[run_dir]/boot/grub/grub.cfg" "WRONLY CREAT TRUNC"]
puts $fh "set timeout=0"
# tell grub2 to prefer 32bit framebuffer resolution
puts $fh "set gfxpayload=\"0x0x32\""
puts $fh "menuentry 'Genode on seL4' {"
puts $fh " insmod multiboot2"
puts $fh " multiboot2 /boot/bender phys_max=256M $serial_bender_opt"