Squash commits for public release

2025-02-12 09:54:05 -05:00
commit 7118adc514
1108 changed files with 80873 additions and 0 deletions
--- a/boot/x86_64/prekernel/drivers/port.h
+++ b/boot/x86_64/prekernel/drivers/port.h
@@ -0,0 +1,61 @@
+#ifndef _BOOT_DRIVERS_PORT_H
+#define _BOOT_DRIVERS_PORT_H
+
+#include <libboot/types.h>
+
+static inline uint8_t port_read8(uint16_t port)
+{
+    uint8_t result_data;
+    asm volatile("inb %%dx, %%al"
+                 : "=a"(result_data)
+                 : "d"(port));
+    return result_data;
+}
+
+static inline void port_write8(uint16_t port, uint8_t data)
+{
+    asm volatile("outb %%al, %%dx"
+                 :
+                 : "a"(data), "d"(port));
+}
+
+static inline uint16_t port_read16(uint16_t port)
+{
+    uint16_t result_data;
+    asm volatile("inw %%dx, %%ax"
+                 : "=a"(result_data)
+                 : "d"(port));
+    return result_data;
+}
+
+static inline void port_write16(uint16_t port, uint16_t data)
+{
+    asm volatile("outw %%ax, %%dx"
+                 :
+                 : "a"(data), "d"(port));
+}
+
+static inline uint32_t port_read32(uint16_t port)
+{
+    uint32_t result_data;
+    asm volatile("inl %%dx, %%eax"
+                 : "=a"(result_data)
+                 : "d"(port));
+    return result_data;
+}
+
+static inline void port_write32(uint16_t port, uint32_t data)
+{
+    asm volatile("outl %%eax, %%dx"
+                 :
+                 : "a"(data), "d"(port));
+}
+
+static inline void port_wait_io()
+{
+    asm volatile("out %%al, $0x80"
+                 :
+                 : "a"(0));
+}
+
+#endif // _BOOT_DRIVERS_PORT_H