From 54e7efbbd0e0c88d99bb6bddb82e9fc8d90eae50 Mon Sep 17 00:00:00 2001 From: Alex Auvolat Date: Sun, 30 Nov 2014 19:58:32 +0100 Subject: Add debug output and a few elementary stdlib functions. --- kernel/l0/sys.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 kernel/l0/sys.c (limited to 'kernel/l0/sys.c') diff --git a/kernel/l0/sys.c b/kernel/l0/sys.c new file mode 100644 index 0000000..f6a9900 --- /dev/null +++ b/kernel/l0/sys.c @@ -0,0 +1,44 @@ +#include +#include + + +// C wrappers for inb/outb/inw/outw + +void outb(uint16_t port, uint8_t value) { + asm volatile("outb %1, %0" : : "dN"(port), "a"(value)); +} + +void outw(uint16_t port, uint16_t value) { + asm volatile("outw %1, %0" : : "dN"(port), "a"(value)); +} + +uint8_t inb(uint16_t port) { + uint8_t ret; + asm volatile("inb %1, %0" : "=a"(ret) : "dN"(port)); + return ret; +} + +uint16_t inw(uint16_t port) { + uint16_t ret; + asm volatile("inw %1, %0" : "=a"(ret) : "dN"(port)); + return ret; +} + +// Kernel panic and kernel assert failure + +static void panic_do(const char* type, const char *msg, const char* file, int line) { + asm volatile("cli;"); + dbg_printf("/\n| %s:\t%s\n", type, msg); + dbg_printf("| File: \t%s:%i\n", file, line); + dbg_printf("| System halted -_-'\n"); + dbg_printf("\\---------------------------------------------------------/"); + asm volatile("hlt"); +} + +void panic(const char* message, const char* file, int line) { + panic_do("PANIC", message, file, line); +} + +void panic_assert(const char* assertion, const char* file, int line) { + panic_do("ASSERT FAILED", assertion, file, line); +} -- cgit v1.2.3