3 files changed, 112 insertions, 0 deletions
diff --git a/drivers/include/pcspkr.h b/drivers/include/pcspkr.h
new file mode 100644
index 0000000..84e640f
--- /dev/null
+++ b/drivers/include/pcspkr.h
@@ -0,0 +1,3 @@
+#include <stdint.h>
+
+void pcspkr_play(uint32_t freq);
diff --git a/drivers/pcspkr.c b/drivers/pcspkr.c
new file mode 100644
index 0000000..33c0540
--- /dev/null
+++ b/drivers/pcspkr.c
@@ -0,0 +1,19 @@
+#include <stdint.h>
+#include "io.h"
+#include "pcspkr.h"
+
+void pcspkr_play(uint32_t freq)
+{
+    uint32_t div;
+    uint8_t tmp;
+
+    div = 1193180 / freq;
+    outb(0x43, 0xb6);
+    outb(0x42, (uint8_t)(div));
+    outb(0x42, (uint8_t)(div >> 8));
+
+    tmp = inb(0x61);
+    if (tmp != (tmp | 3)) {
+        outb(0x61, tmp | 3);
+    }
+}
diff --git a/kernel/include/multiboot.h b/kernel/include/multiboot.h
new file mode 100644
index 0000000..e1f7cf0
--- /dev/null
+++ b/kernel/include/multiboot.h
@@ -0,0 +1,90 @@
+#include <stdint.h>
+
+struct multiboot_aout_symbol_table_t
+{
+    uint32_t tabsize;
+    uint32_t strsize;
+    uint32_t addr;
+    uint32_t reserved;
+} __attribute__((packed));
+
+struct multiboot_elf_section_header_table_t
+{
+    uint32_t num;
+    uint32_t size;
+    uint32_t addr;
+    uint32_t shndx;
+} __attribute__((packed));
+
+struct vbe_info_t {
+    uint16_t attributes;
+    uint8_t winA, winB;
+    uint16_t granularity;
+    uint16_t winsize;
+    uint16_t segmentA, segmentB;
+    uint32_t realFctPtr;
+    uint16_t pitch;
+    uint16_t Xres, Yres;
+    uint8_t Wchar, Ychar, planes, bpp, banks;
+    uint8_t memory_model, bank_size, image_pages;
+    uint8_t reserved0;
+    uint8_t red_mask, red_position;
+    uint8_t green_mask, green_position;
+    uint8_t blue_mask, blue_position;
+    uint8_t rsv_mask, rsv_position;
+    uint8_t directcolor_attributes;
+    uint32_t physbase;
+    uint32_t reserved1;
+    uint16_t reserved2;
+} __attribute__((packed));
+
+struct multiboot_info_t
+{
+    /* Multiboot info version number */
+    uint32_t flags;
+
+    /* Available memory from BIOS */
+    uint32_t mem_lower;
+    uint32_t mem_upper;
+
+    /* "root" partition */
+    uint32_t boot_device;
+
+    /* Kernel command line */
+    uint32_t cmdline;
+
+    /* Boot-Module list */
+    uint32_t mods_count;
+    uint32_t mods_addr;
+
+    union
+    {
+        struct multiboot_aout_symbol_table_t aout_sym;
+        struct multiboot_elf_section_header_table_t elf_sec;
+    } u;
+
+    /* Memory Mapping buffer */
+    uint32_t mmap_length;
+    uint32_t mmap_addr;
+
+    /* Drive Info buffer */
+    uint32_t drives_length;
+    uint32_t drives_addr;
+
+    /* ROM configuration table */
+    uint32_t config_table;
+
+    /* Boot Loader Name */
+    uint32_t boot_loader_name;
+
+    /* APM table */
+    uint32_t apm_table;
+
+    /* Video */
+    uint32_t vbe_control_info;
+    uint32_t vbe_mode_info;
+    uint16_t vbe_mode;
+    uint16_t vbe_interface_seg;
+    uint16_t vbe_interface_off;
+    uint16_t vbe_interface_len;
+} __attribute__((packed));