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Cleanup

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This commit is contained in:
Baptiste Wicht 2013-12-15 21:40:26 +01:00
parent 9873c153ef
commit 3a2077a446
1 changed files with 48 additions and 32 deletions
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80
kernel/src/boot/boot_16.cpp
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@ -72,41 +72,57 @@ constexpr uint64_t gdt_entry(uint32_t base, uint32_t limit, uint16_t flags){
(((limit) & 0x0000ffffULL)));
}
#define GDT_ENTRY(f1, f2) \
((static_cast<uint64_t>(0x0FFFF) << 48) | \
(((f1)) << 16) | \
(((f2)) << 8)) \
// Descriptor type (0 for system, 1 for code/data)
constexpr uint16_t SEG_DESCTYPE(uint16_t x){
return x << 0x04;
}
#define B_10011010 0x9A
#define B_11001111 0xCF
#define B_10010010 0x92
#define B_10001111 0x8F
#define B_10101111 0xAF
// Present
constexpr uint16_t SEG_PRES(uint16_t x){
return x << 0x07;
}
#define SEG_DESCTYPE(x) ((x) << 0x04) // Descriptor type (0 for system, 1 for code/data)
#define SEG_PRES(x) ((x) << 0x07) // Present
#define SEG_SAVL(x) ((x) << 0x0C) // Available for system use
#define SEG_LONG(x) ((x) << 0x0D) // Long mode
#define SEG_SIZE(x) ((x) << 0x0E) // Size (0 for 16-bit, 1 for 32)
#define SEG_GRAN(x) ((x) << 0x0F) // Granularity (0 for 1B - 1MB, 1 for 4KB - 4GB)
#define SEG_PRIV(x) (((x) & 0x03) << 0x05) // Set privilege level (0 - 3)
// Available for system use
constexpr uint16_t SEG_SAVL(uint16_t x){
return x << 0x0C;
}
#define SEG_DATA_RD 0x00 // Read-Only
#define SEG_DATA_RDA 0x01 // Read-Only, accessed
#define SEG_DATA_RDWR 0x02 // Read/Write
#define SEG_DATA_RDWRA 0x03 // Read/Write, accessed
#define SEG_DATA_RDEXPD 0x04 // Read-Only, expand-down
#define SEG_DATA_RDEXPDA 0x05 // Read-Only, expand-down, accessed
#define SEG_DATA_RDWREXPD 0x06 // Read/Write, expand-down
#define SEG_DATA_RDWREXPDA 0x07 // Read/Write, expand-down, accessed
#define SEG_CODE_EX 0x08 // Execute-Only
#define SEG_CODE_EXA 0x09 // Execute-Only, accessed
#define SEG_CODE_EXRD 0x0A // Execute/Read
#define SEG_CODE_EXRDA 0x0B // Execute/Read, accessed
#define SEG_CODE_EXC 0x0C // Execute-Only, conforming
#define SEG_CODE_EXCA 0x0D // Execute-Only, conforming, accessed
#define SEG_CODE_EXRDC 0x0E // Execute/Read, conforming
#define SEG_CODE_EXRDCA 0x0F // Execute/Read, conforming, accessed
// Long mode
constexpr uint16_t SEG_LONG(uint16_t x){
return x << 0x0D;
}
// Size (0 for 16-bit, 1 for 32) (must be 0 for 64)
constexpr uint16_t SEG_SIZE(uint16_t x){
return x << 0x0E;
}
// Granularity (0 for 1B->1MB, 1 for 4KB->4GB)
constexpr uint16_t SEG_GRAN(uint16_t x){
return x << 0x0F;
}
// Privilege level (0 - 3)
constexpr uint16_t SEG_PRIV(uint16_t x){
return (x & 0x03) << 0x05;
}
constexpr const uint16_t SEG_DATA_RD = 0x00; // Read-Only
constexpr const uint16_t SEG_DATA_RDA = 0x01; // Read-Only, accessed
constexpr const uint16_t SEG_DATA_RDWR = 0x02; // Read/Write
constexpr const uint16_t SEG_DATA_RDWRA = 0x03; // Read/Write, accessed
constexpr const uint16_t SEG_DATA_RDEXPD = 0x04; // Read-Only, expand-down
constexpr const uint16_t SEG_DATA_RDEXPDA = 0x05; // Read-Only, expand-down, accessed
constexpr const uint16_t SEG_DATA_RDWREXPD = 0x06; // Read/Write, expand-down
constexpr const uint16_t SEG_DATA_RDWREXPDA = 0x07; // Read/Write, expand-down, accessed
constexpr const uint16_t SEG_CODE_EX = 0x08; // Execute-Only
constexpr const uint16_t SEG_CODE_EXA = 0x09; // Execute-Only, accessed
constexpr const uint16_t SEG_CODE_EXRD = 0x0A; // Execute/Read
constexpr const uint16_t SEG_CODE_EXRDA = 0x0B; // Execute/Read, accessed
constexpr const uint16_t SEG_CODE_EXC = 0x0C; // Execute-Only, conforming
constexpr const uint16_t SEG_CODE_EXCA = 0x0D; // Execute-Only, conforming, accessed
constexpr const uint16_t SEG_CODE_EXRDC = 0x0E; // Execute/Read, conforming
constexpr const uint16_t SEG_CODE_EXRDCA = 0x0F; // Execute/Read, conforming, accessed
constexpr uint16_t code_32_selector(){
return