Squash commits for public release

kernel/include/platform/x86/system.h

@@ -0,0 +1,100 @@
+#ifndef _KERNEL_PLATFORM_X86_SYSTEM_H
+#define _KERNEL_PLATFORM_X86_SYSTEM_H
+
+#include <libkern/c_attrs.h>
+#include <libkern/types.h>
+#include <platform/generic/registers.h>
+
+/**
+ * INTS
+ */
+
+void system_disable_interrupts();
+void system_enable_interrupts();
+void system_enable_interrupts_only_counter();
+inline static void system_disable_interrupts_no_counter() { asm volatile("cli"); }
+inline static void system_enable_interrupts_no_counter() { asm volatile("sti"); }
+
+/**
+ * PAGING
+ */
+
+inline static void system_set_pdir(uintptr_t pdir0, uintptr_t pdir1)
+{
+    asm volatile("mov %0, %%cr3"
+                 :
+                 : "r"(pdir0)
+                 : "memory");
+}
+
+inline static void system_flush_local_tlb_entry(uintptr_t vaddr)
+{
+    asm volatile("invlpg (%0)" ::"r"(vaddr)
+                 : "memory");
+}
+
+inline static void system_flush_all_cpus_tlb_entry(uintptr_t vaddr)
+{
+    system_flush_local_tlb_entry(vaddr);
+    // TODO: Send inter-processor messages.
+}
+
+inline static void system_flush_whole_tlb()
+{
+    system_set_pdir(read_cr3(), 0x0);
+}
+
+inline static void system_enable_write_protect()
+{
+    uintptr_t cr = read_cr0();
+    cr |= 0x10000;
+    write_cr0(cr);
+}
+
+inline static void system_disable_write_protect()
+{
+    uintptr_t cr = read_cr0();
+    cr &= 0xfffeffff;
+    write_cr0(cr);
+}
+
+inline static void system_enable_paging()
+{
+    uintptr_t cr = read_cr0();
+    cr |= 0x80000000;
+    write_cr0(cr);
+}
+
+inline static void system_disable_paging()
+{
+    uintptr_t cr = read_cr0();
+    cr &= 0x7fffffff;
+    write_cr0(cr);
+}
+
+inline static void system_stop_until_interrupt()
+{
+    asm volatile("hlt");
+}
+
+NORETURN inline static void system_stop()
+{
+    system_disable_interrupts();
+    system_stop_until_interrupt();
+    while (1) { }
+}
+
+/**
+ * CPU
+ */
+
+void system_cache_clean_and_invalidate(void* addr, size_t size);
+void system_cache_invalidate(void* addr, size_t size);
+void system_cache_clean(void* addr, size_t size);
+
+inline static int system_cpu_id()
+{
+    return 0;
+}
+
+#endif /* _KERNEL_PLATFORM_X86_SYSTEM_H */