2024-03-19 09:23:45 -05:00
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include tasking.i
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include vmem.i
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include term.i
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section .text,text
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; Handle a syscall
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; Syscall number in d0
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public handle_syscall
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handle_syscall:
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; Get the d0th entry in the syscall table
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move.l #syscall_table, a6
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lsl.l #2, d0
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adda.l d0, a6
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move.l (a6), a6
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; Call the entry
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jsr (a6)
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rts
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syscall_exit:
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jmp tasking_exit
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syscall_yield:
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jmp tasking_yield
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syscall_print:
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jmp term_print
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syscall_println:
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jmp term_println
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; Maps the range of pages starting at address a0 with length d1 to free physical frames
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; Permission flags in d2
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syscall_vmem_map:
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move.l d1, d0
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move.l #0, d1
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ori.l #$4, d2
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jmp vmem_map
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; Map a free range of pages with length d1 to free physical frames
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; Returns the range start in a0
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; Permission flags in d2
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syscall_vmem_map_free:
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move.l d1, d0
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move.l #2, d1
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ori.l #$4, d2
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jmp vmem_map_free
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; Maps a free range of virtual pages with length d2 to the range of physical frames starting at d1
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; Returns the range start in a0
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; Permission flags in d3
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syscall_vmem_map_free_to:
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move.l d1, d0
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move.l d2, d1
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move.l #2, d2
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ori.l #$4, d3
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jmp vmem_map_free_to
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2024-03-19 12:48:55 -05:00
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; Sets the permission flags of the range of virtual pages starting at address a0 with length d2 to d1
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syscall_vmem_set_flags:
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move.l d1, d0
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move.l d2, d1
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move.l #0, d2
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jmp vmem_set_flags
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2024-03-19 13:09:43 -05:00
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; Copies the range of page mappings at address a0 in the primary space with length d1 to the secondary space starting at address a1
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syscall_vmem_copy_to_secondary:
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movem.l a0/a1/d1, -(a7)
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jsr tasking_get_secondary_addr_space
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jsr vmem_set_secondary_addr_space
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movem.l (a7)+, a0/a1/d1
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move.l d1, d0
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jsr vmem_copy_to_secondary
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rts
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2024-03-19 13:39:03 -05:00
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; Creates a new process using the secondary address space of the current process and entry in a0
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syscall_new_process:
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move.l a0, -(a7)
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jsr tasking_get_secondary_addr_space
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move.l (a7)+, a1
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jsr tasking_new_process
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rts
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2024-03-19 13:09:43 -05:00
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2024-03-19 09:23:45 -05:00
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section .data,data
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syscall_table:
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align 1
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dc.l syscall_exit
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dc.l syscall_yield
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dc.l syscall_print
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dc.l syscall_println
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dc.l syscall_vmem_map
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dc.l syscall_vmem_map_free
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dc.l syscall_vmem_map_free_to
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2024-03-19 12:48:55 -05:00
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dc.l syscall_vmem_set_flags
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2024-03-19 13:09:43 -05:00
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dc.l syscall_vmem_copy_to_secondary
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2024-03-19 13:39:03 -05:00
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dc.l syscall_new_process
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