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Initial ramdisk support

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- Create initrd library to support definitions and loading
- Allow tools compiled for the host machine to be built by wscript
- Create makerd tool to build initrd from manifest
- Move screenfont to initrd, so don't load framebuffer initially
This commit is contained in:
Justin C. Miller
2018-09-05 22:42:18 -07:00
parent dc40c2f6ad
commit 1758ee4215
20 changed files with 592 additions and 181 deletions
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15
src/kernel/device_manager.cpp
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@@ -41,19 +41,10 @@ struct acpi2_rsdp
uint8_t reserved[3];
} __attribute__ ((packed));
uint8_t
acpi_checksum(const void *p, size_t len, size_t off = 0)
{
uint8_t sum = 0;
const uint8_t *c = reinterpret_cast<const uint8_t *>(p);
for (int i = off; i < len; ++i) sum += c[i];
return sum;
}
bool
acpi_table_header::validate(uint32_t expected_type) const
{
if (acpi_checksum(this, length) != 0) return false;
if (kutil::checksum(this, length) != 0) return false;
return !expected_type || (expected_type == type);
}
@@ -86,7 +77,7 @@ device_manager::device_manager(const void *root_table) :
kassert(acpi1->signature[i] == expected_signature[i],
"ACPI RSDP table signature mismatch");
uint8_t sum = acpi_checksum(acpi1, sizeof(acpi1_rsdp), 0);
uint8_t sum = kutil::checksum(acpi1, sizeof(acpi1_rsdp), 0);
kassert(sum == 0, "ACPI 1.0 RSDP checksum mismatch.");
kassert(acpi1->revision > 1, "ACPI 1.0 not supported.");
@@ -94,7 +85,7 @@ device_manager::device_manager(const void *root_table) :
const acpi2_rsdp *acpi2 =
reinterpret_cast<const acpi2_rsdp *>(acpi1);
sum = acpi_checksum(acpi2, sizeof(acpi2_rsdp), sizeof(acpi1_rsdp));
sum = kutil::checksum(acpi2, sizeof(acpi2_rsdp), sizeof(acpi1_rsdp));
kassert(sum == 0, "ACPI 2.0 RSDP checksum mismatch.");
load_xsdt(reinterpret_cast<const acpi_xsdt *>(acpi2->xsdt_address));