mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-09-19 21:32:58 +00:00
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
// ***************************************
|
|
// SCTLR_EL1, System Control Register (EL1), Page 2654 of AArch64-Reference-Manual.
|
|
// ***************************************
|
|
|
|
#define SCTLR_RESERVED (3 << 28) | (3 << 22) | (1 << 20) | (1 << 11)
|
|
#define SCTLR_EE_LITTLE_ENDIAN (0 << 25)
|
|
#define SCTLR_EOE_LITTLE_ENDIAN (0 << 24)
|
|
#define SCTLR_I_CACHE_DISABLED (0 << 12)
|
|
#define SCTLR_D_CACHE_DISABLED (0 << 2)
|
|
#define SCTLR_MMU_DISABLED (0 << 0)
|
|
#define SCTLR_MMU_ENABLED (1 << 0)
|
|
|
|
#define SCTLR_VALUE_MMU_DISABLED (SCTLR_RESERVED | SCTLR_EE_LITTLE_ENDIAN | SCTLR_I_CACHE_DISABLED | SCTLR_D_CACHE_DISABLED | SCTLR_MMU_DISABLED)
|
|
|
|
// ***************************************
|
|
// HCR_EL2, Hypervisor Configuration Register (EL2), Page 2487 of AArch64-Reference-Manual.
|
|
// ***************************************
|
|
|
|
#define HCR_RW (1 << 31)
|
|
#define HCR_VALUE HCR_RW
|
|
|
|
// ***************************************
|
|
// SCR_EL3, Secure Configuration Register (EL3), Page 2648 of AArch64-Reference-Manual.
|
|
// ***************************************
|
|
|
|
#define SCR_RESERVED (3 << 4)
|
|
#define SCR_RW (1 << 10)
|
|
#define SCR_NS (1 << 0)
|
|
#define SCR_VALUE (SCR_RESERVED | SCR_RW | SCR_NS)
|
|
|
|
// ***************************************
|
|
// SPSR_EL3, Saved Program Status Register (EL3) Page 389 of AArch64-Reference-Manual.
|
|
// ***************************************
|
|
|
|
#define SPSR_MASK_ALL (7 << 6)
|
|
#define SPSR_EL1h (5 << 0)
|
|
#define SPSR_VALUE (SPSR_MASK_ALL | SPSR_EL1h)
|
|
|
|
// ***************************************
|
|
// Memory management stuff
|
|
// ***************************************
|
|
|
|
#define PAGE_SHIFT 12
|
|
#define TABLE_SHIFT 9
|
|
#define SECTION_SHIFT (PAGE_SHIFT + TABLE_SHIFT)
|
|
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#define SECTION_SIZE (1 << SECTION_SHIFT)
|
|
|
|
#define LOW_MEMORY (2 * SECTION_SIZE) // 0x400000
|
|
|
|
// ***************************************
|
|
// Timer stuff
|
|
// ***************************************
|
|
|
|
#define LOCAL_CONTROL 0xff800000
|
|
#define LOCAL_PRESCALER 0xff800008
|
|
#define OSC_FREQ 54000000
|