119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
#include <stdio.h>
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#include <drivers/irq.h>
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#include <mm/pmm.h>
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#include <mm/paging.h>
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#include <tty.h>
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#include <drivers/serio.h>
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#include <kernel/syscall.h>
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/*
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Espresso has two types of syscalls.
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one: int 16, the only one I've worked on. should be able to be used in kernel code and user-space.
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two: syscall/sysenter, the ones I haven't worked on because it has to do with userspace code.
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*/
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/*
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NOTE: passing arguments to fuctions
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to pass args to functions, use all registers except eax,
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so ebx is arg0, ecx arg1, edx arg2, esi arg3, edi arg4, ebp arg5
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*/
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void init_sysints(void)
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{
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/* actually nothing to do */
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set_irq_handler(16, (irq_func_t) int16_handler);
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}
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/* 0 in eax means success most of the time */
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registers_t* int16_handler(registers_t* regs)
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{
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//printf("eax: %0x%x\n", regs->eax);
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uint32_t eax = regs->eax;
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if (eax >= __ENUM_END_MARKER__)
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{
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printf("Invalid system call %i\n", eax);
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return regs;
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}
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switch (eax)
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{
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case SYS_MAP_PAGE:
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map_page((void*) regs->ebx, (void*) regs->ecx);
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break;
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case SYS_PMM_ALLOC_PAGE:
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eax = (uint32_t) pmm_alloc_page();
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break;
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case SYS_PMM_FREE_PAGE:
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pmm_free_page((void*) regs->ebx);
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break;
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case SYS_SERIAL_WRITE:
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serial_write(regs->ebx);
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break;
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case SYS_SERIAL_READ:
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eax = serial_read();
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break;
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case SYS_SERIAL_PUTS:
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serial_puts((const char*) regs->ebx);
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break;
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case SYS_USE_SERIAL:
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eax = use_serial();
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break;
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case SYS_TERMINAL_SCROLL:
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terminal_scroll();
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break;
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case SYS_TERMINAL_CLEAR:
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terminal_clear();
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break;
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case SYS_TERMINAL_SET_CURSOR:
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terminal_set_cursor(regs->ebx, regs->ecx);
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break;
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case SYS_TERMINAL_GET_CURSOR:
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terminal_get_cursor((int*) regs->ebx, (int*) regs->ecx);
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break;
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case SYS_TERMINAL_WRITE:
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terminal_write((const char*) regs->ebx, regs->ecx);
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break;
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case SYS_TERMINAL_WRITESTRING:
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terminal_writestring((const char*) regs->ebx);
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break;
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case SYS_TERMINAL_DEBUG_WRITESTRING:
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terminal_debug_writestring((const char*) regs->ebx);
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break;
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case SYS_TERMINAL_PUTCHAR:
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terminal_putchar(regs->ebx);
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break;
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case SYS_TERMINAL_PUTENTRYAT:
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terminal_putentryat(regs->ebx, regs->ecx, regs->edx, regs->esi);
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break;
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case SYS_TERMINAL_GETCOLOR:
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eax = terminal_getcolor();
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break;
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case SYS_TERMINAL_SETCOLOR:
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terminal_setcolor(regs->ebx);
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break;
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case SYS_READ:
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eax = read(regs->ebx, (void*) regs->ecx, regs->edx);
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break;
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case SYS_WRITE:
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eax = write(regs->ebx, (void*) regs->ecx, regs->edx);
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break;
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default:
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printf("nothing happened.\n");
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break;
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}
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regs->eax = eax;
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return regs;
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}
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