mirror of
https://github.com/isometimes/rpi4-osdev
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160 lines
3.7 KiB
ArmAsm
160 lines
3.7 KiB
ArmAsm
#define SYNC_INVALID_EL1t 0
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#define IRQ_INVALID_EL1t 1
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#define FIQ_INVALID_EL1t 2
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#define ERROR_INVALID_EL1t 3
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#define SYNC_INVALID_EL1h 4
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#define IRQ_INVALID_EL1h 5
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#define FIQ_INVALID_EL1h 6
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#define ERROR_INVALID_EL1h 7
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#define SYNC_INVALID_EL0_64 8
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#define IRQ_INVALID_EL0_64 9
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#define FIQ_INVALID_EL0_64 10
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#define ERROR_INVALID_EL0_64 11
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#define SYNC_INVALID_EL0_32 12
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#define IRQ_INVALID_EL0_32 13
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#define FIQ_INVALID_EL0_32 14
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#define ERROR_INVALID_EL0_32 15
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//stack frame size
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#define S_FRAME_SIZE 256
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.macro kernel_entry
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sub sp, sp, #S_FRAME_SIZE
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stp x0, x1, [sp, #16 * 0]
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stp x2, x3, [sp, #16 * 1]
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stp x4, x5, [sp, #16 * 2]
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stp x6, x7, [sp, #16 * 3]
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stp x8, x9, [sp, #16 * 4]
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stp x10, x11, [sp, #16 * 5]
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stp x12, x13, [sp, #16 * 6]
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stp x14, x15, [sp, #16 * 7]
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stp x16, x17, [sp, #16 * 8]
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stp x18, x19, [sp, #16 * 9]
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stp x20, x21, [sp, #16 * 10]
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stp x22, x23, [sp, #16 * 11]
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stp x24, x25, [sp, #16 * 12]
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stp x26, x27, [sp, #16 * 13]
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stp x28, x29, [sp, #16 * 14]
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str x30, [sp, #16 * 15]
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.endm
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.macro kernel_exit
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ldp x0, x1, [sp, #16 * 0]
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ldp x2, x3, [sp, #16 * 1]
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ldp x4, x5, [sp, #16 * 2]
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ldp x6, x7, [sp, #16 * 3]
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ldp x8, x9, [sp, #16 * 4]
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ldp x10, x11, [sp, #16 * 5]
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ldp x12, x13, [sp, #16 * 6]
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ldp x14, x15, [sp, #16 * 7]
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ldp x16, x17, [sp, #16 * 8]
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ldp x18, x19, [sp, #16 * 9]
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ldp x20, x21, [sp, #16 * 10]
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ldp x22, x23, [sp, #16 * 11]
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ldp x24, x25, [sp, #16 * 12]
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ldp x26, x27, [sp, #16 * 13]
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ldp x28, x29, [sp, #16 * 14]
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ldr x30, [sp, #16 * 15]
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add sp, sp, #S_FRAME_SIZE
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eret
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.endm
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.macro handle_invalid_entry type
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kernel_entry
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mov x0, #\type
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mrs x1, esr_el1
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mrs x2, elr_el1
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// We could pass this to a function to print an error here
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// e.g. bl show_invalid_entry_message
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//
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// For now we'll just hang
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b err_hang
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.endm
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.macro ventry label
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.align 7
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b \label
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.endm
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//Exception vectors table
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.align 11
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.globl vectors
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vectors:
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ventry sync_invalid_el1t // Synchronous EL1t
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ventry irq_invalid_el1t // IRQ EL1t
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ventry fiq_invalid_el1t // FIQ EL1t
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ventry error_invalid_el1t // Error EL1t
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ventry sync_invalid_el1h // Synchronous EL1h
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ventry handle_el1_irq // IRQ EL1h
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ventry fiq_invalid_el1h // FIQ EL1h
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ventry error_invalid_el1h // Error EL1h
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ventry sync_invalid_el0_64 // Synchronous 64-bit EL0
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ventry irq_invalid_el0_64 // IRQ 64-bit EL0
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ventry fiq_invalid_el0_64 // FIQ 64-bit EL0
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ventry error_invalid_el0_64 // Error 64-bit EL0
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ventry sync_invalid_el0_32 // Synchronous 32-bit EL0
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ventry irq_invalid_el0_32 // IRQ 32-bit EL0
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ventry fiq_invalid_el0_32 // FIQ 32-bit EL0
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ventry error_invalid_el0_32 // Error 32-bit EL0
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sync_invalid_el1t:
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handle_invalid_entry SYNC_INVALID_EL1t
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irq_invalid_el1t:
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handle_invalid_entry IRQ_INVALID_EL1t
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fiq_invalid_el1t:
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handle_invalid_entry FIQ_INVALID_EL1t
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error_invalid_el1t:
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handle_invalid_entry ERROR_INVALID_EL1t
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sync_invalid_el1h:
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handle_invalid_entry SYNC_INVALID_EL1h
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fiq_invalid_el1h:
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handle_invalid_entry FIQ_INVALID_EL1h
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error_invalid_el1h:
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handle_invalid_entry ERROR_INVALID_EL1h
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sync_invalid_el0_64:
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handle_invalid_entry SYNC_INVALID_EL0_64
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irq_invalid_el0_64:
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handle_invalid_entry IRQ_INVALID_EL0_64
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fiq_invalid_el0_64:
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handle_invalid_entry FIQ_INVALID_EL0_64
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error_invalid_el0_64:
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handle_invalid_entry ERROR_INVALID_EL0_64
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sync_invalid_el0_32:
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handle_invalid_entry SYNC_INVALID_EL0_32
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irq_invalid_el0_32:
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handle_invalid_entry IRQ_INVALID_EL0_32
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fiq_invalid_el0_32:
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handle_invalid_entry FIQ_INVALID_EL0_32
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error_invalid_el0_32:
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handle_invalid_entry ERROR_INVALID_EL0_32
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handle_el1_irq:
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kernel_entry
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bl handle_irq
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kernel_exit
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.globl err_hang
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err_hang: b err_hang
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