Squash commits for public release

kernel/include/platform/x86/i386/tasking/context.h

@@ -0,0 +1,26 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_TASKING_CONTEXT_H
+#define _KERNEL_PLATFORM_X86_I386_TASKING_CONTEXT_H
+
+#include <libkern/c_attrs.h>
+#include <libkern/types.h>
+
+struct PACKED context {
+    uint32_t edi;
+    uint32_t esi;
+    uint32_t ebx;
+    uint32_t ebp;
+    uint32_t eip;
+};
+typedef struct context context_t;
+
+static inline uintptr_t context_get_instruction_pointer(context_t* ctx)
+{
+    return ctx->eip;
+}
+
+static inline void context_set_instruction_pointer(context_t* ctx, uintptr_t ip)
+{
+    ctx->eip = ip;
+}
+
+#endif // _KERNEL_PLATFORM_X86_I386_TASKING_CONTEXT_H

kernel/include/platform/x86/i386/tasking/trapframe.h

@@ -0,0 +1,125 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_TASKING_TRAPFRAME_H
+#define _KERNEL_PLATFORM_X86_I386_TASKING_TRAPFRAME_H
+
+#include <libkern/c_attrs.h>
+#include <libkern/types.h>
+#include <platform/x86/gdt.h>
+#include <platform/x86/tasking/tss.h>
+
+struct PACKED trapframe {
+    // registers as pushed by pusha
+    uint32_t edi;
+    uint32_t esi;
+    uint32_t ebp;
+    uint32_t oesp; // useless & ignored
+    uint32_t ebx;
+    uint32_t edx;
+    uint32_t ecx;
+    uint32_t eax;
+
+    // rest of trap frame
+    uint16_t gs;
+    uint16_t padding1;
+    uint16_t fs;
+    uint16_t padding2;
+    uint16_t es;
+    uint16_t padding3;
+    uint16_t ds;
+    uint16_t padding4;
+    uint32_t int_no;
+
+    // below here defined by x86 hardware
+    uint32_t err;
+    uint32_t eip;
+    uint16_t cs;
+    uint16_t padding5;
+    uint32_t eflags;
+
+    // below here only when crossing rings, such as from user to kernel
+    uint32_t esp;
+    uint16_t ss;
+    uint16_t padding6;
+};
+typedef struct trapframe trapframe_t;
+
+static inline uintptr_t get_stack_pointer(trapframe_t* tf)
+{
+    return tf->esp;
+}
+
+static inline void set_stack_pointer(trapframe_t* tf, uintptr_t sp)
+{
+    tf->esp = sp;
+}
+
+static inline uintptr_t get_frame_pointer(trapframe_t* tf)
+{
+    return tf->ebp;
+}
+
+static inline void set_frame_pointer(trapframe_t* tf, uintptr_t bp)
+{
+    tf->ebp = bp;
+}
+
+static inline uintptr_t get_instruction_pointer(trapframe_t* tf)
+{
+    return tf->eip;
+}
+
+static inline void set_instruction_pointer(trapframe_t* tf, uintptr_t ip)
+{
+    tf->eip = ip;
+}
+
+static inline uintptr_t get_syscall_result(trapframe_t* tf)
+{
+    return tf->eax;
+}
+
+static inline void set_syscall_result(trapframe_t* tf, uintptr_t val)
+{
+    tf->eax = val;
+}
+
+/**
+ * STACK FUNCTIONS
+ */
+
+static inline void tf_push_to_stack(trapframe_t* tf, uintptr_t val)
+{
+    tf->esp -= sizeof(uintptr_t);
+    *((uintptr_t*)tf->esp) = val;
+}
+
+static inline uint32_t tf_pop_to_stack(trapframe_t* tf)
+{
+    uintptr_t val = *((uintptr_t*)tf->esp);
+    tf->esp += sizeof(uintptr_t);
+    return val;
+}
+
+static inline void tf_move_stack_pointer(trapframe_t* tf, int32_t val)
+{
+    tf->esp += val;
+}
+
+static inline void tf_setup_as_user_thread(trapframe_t* tf)
+{
+    tf->cs = (GDT_SEG_UCODE << 3) | DPL_USER;
+    tf->ds = (GDT_SEG_UDATA << 3) | DPL_USER;
+    tf->es = tf->ds;
+    tf->ss = tf->ds;
+    tf->eflags = FL_IF;
+}
+
+static inline void tf_setup_as_kernel_thread(trapframe_t* tf)
+{
+    tf->cs = (GDT_SEG_KCODE << 3);
+    tf->ds = (GDT_SEG_KDATA << 3);
+    tf->es = tf->ds;
+    tf->ss = tf->ds;
+    tf->eflags = FL_IF;
+}
+
+#endif // _KERNEL_PLATFORM_X86_I386_TASKING_TRAPFRAME_H

kernel/include/platform/x86/i386/vmm/consts.h

@@ -0,0 +1,29 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_VMM_CONSTS_H
+#define _KERNEL_PLATFORM_X86_I386_VMM_CONSTS_H
+
+static inline int vm_page_mask()
+{
+    return 0xfff;
+}
+
+#define VMM_LV0_ENTITY_COUNT (1024)
+#define VMM_LV1_ENTITY_COUNT (1024)
+#define VMM_PAGE_SIZE (4096)
+
+#define VMM_OFFSET_IN_DIRECTORY(a) (((a) >> 22) & 0x3ff)
+#define VMM_OFFSET_IN_TABLE(a) (((a) >> 12) & 0x3ff)
+#define VMM_OFFSET_IN_PAGE(a) ((a)&0xfff)
+#define TABLE_START(vaddr) ((vaddr >> 22) << 22)
+#define PAGE_START(vaddr) ((vaddr >> 12) << 12)
+#define FRAME(addr) (addr / VMM_PAGE_SIZE)
+
+#define PTABLE_TOP_KERNEL_OFFSET 768
+
+#define PTABLE_LV_TOP (1)
+#define PTABLE_LV0_VADDR_OFFSET (12)
+#define PTABLE_LV1_VADDR_OFFSET (22)
+
+#define USER_HIGH 0xbfffffff
+#define KERNEL_BASE 0xc0000000
+
+#endif //_KERNEL_PLATFORM_X86_I386_VMM_CONSTS_H

kernel/include/platform/x86/i386/vmm/mmu.h

@@ -0,0 +1,29 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_VMM_MMU_H
+#define _KERNEL_PLATFORM_X86_I386_VMM_MMU_H
+
+#include <libkern/types.h>
+#include <mem/bits/mmu.h>
+#include <platform/x86/i386/vmm/pde.h>
+#include <platform/x86/i386/vmm/pte.h>
+
+typedef uint32_t ptable_entity_t;
+typedef uint32_t arch_pf_info_t;
+
+ptable_entity_t vm_mmu_to_arch_flags(mmu_flags_t mmu_flags, ptable_lv_t lv);
+mmu_flags_t vm_arch_to_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv);
+mmu_pf_info_flags_t vm_arch_parse_pf_info(arch_pf_info_t info);
+
+void vm_ptable_entity_set_default_flags(ptable_entity_t* entity, ptable_lv_t lv);
+void vm_ptable_entity_allocated(ptable_entity_t* entity, ptable_lv_t lv);
+void vm_ptable_entity_invalidate(ptable_entity_t* entity, ptable_lv_t lv);
+
+void vm_ptable_entity_set_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv, mmu_flags_t mmu_flags);
+void vm_ptable_entity_rm_mmu_flags(ptable_entity_t* entity, ptable_lv_t lv, mmu_flags_t mmu_flags);
+void vm_ptable_entity_set_frame(ptable_entity_t* entity, ptable_lv_t lv, uintptr_t frame);
+uintptr_t vm_ptable_entity_get_frame(ptable_entity_t* entity, ptable_lv_t lv);
+
+ptable_state_t vm_ptable_entity_state(ptable_entity_t* entity, ptable_lv_t lv);
+bool vm_ptable_entity_is_present(ptable_entity_t* entity, ptable_lv_t lv);
+bool vm_ptable_entity_is_only_allocated(ptable_entity_t* entity, ptable_lv_t lv);
+
+#endif // _KERNEL_PLATFORM_X86_I386_VMM_MMU_H

kernel/include/platform/x86/i386/vmm/pde.h

@@ -0,0 +1,25 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_VMM_PDE_H
+#define _KERNEL_PLATFORM_X86_I386_VMM_PDE_H
+
+#include <libkern/types.h>
+
+#define table_desc_t uint32_t
+#define pde_t uint32_t
+
+#define TABLE_DESC_FRAME_OFFSET 12
+
+enum TABLE_DESC_PAGE_FLAGS {
+    TABLE_DESC_PRESENT = 0x1,
+    TABLE_DESC_WRITABLE = 0x2,
+    TABLE_DESC_USER = 0x4,
+    TABLE_DESC_PWT = 0x8,
+    TABLE_DESC_PCD = 0x10,
+    TABLE_DESC_ACCESSED = 0x20,
+    TABLE_DESC_DIRTY = 0x40,
+    TABLE_DESC_4MB = 0x80,
+    TABLE_DESC_CPU_GLOBAL = 0x100,
+    TABLE_DESC_LV4_GLOBAL = 0x200,
+    TABLE_DESC_COPY_ON_WRITE = 0x400,
+};
+
+#endif //_KERNEL_PLATFORM_X86_I386_VMM_PDE_H

kernel/include/platform/x86/i386/vmm/pte.h

@@ -0,0 +1,23 @@
+#ifndef _KERNEL_PLATFORM_X86_I386_VMM_PTE_H
+#define _KERNEL_PLATFORM_X86_I386_VMM_PTE_H
+
+#include <libkern/types.h>
+#include <mem/bits/mmu.h>
+
+#define PAGE_DESC_FRAME_OFFSET 12
+
+enum PAGE_DESC_PAGE_FLAGS {
+    PAGE_DESC_PRESENT = 0x1,
+    PAGE_DESC_WRITABLE = 0x2,
+    PAGE_DESC_USER = 0x4,
+    PAGE_DESC_WRITETHOUGH = 0x8,
+    PAGE_DESC_NOT_CACHEABLE = 0x10,
+    PAGE_DESC_ACCESSED = 0x20,
+    PAGE_DESC_DIRTY = 0x40,
+    PAGE_DESC_PAT = 0x80,
+    PAGE_DESC_CPU_GLOBAL = 0x100,
+    PAGE_DESC_LV4_GLOBAL = 0x200,
+    PAGE_DESC_COPY_ON_WRITE = 0x400,
+};
+
+#endif //_KERNEL_PLATFORM_X86_I386_VMM_PTE_H