build: add a "user" arch to allow the kernel to run as a program on the host machine

arch/user/include/socks/machine/cpu.h

@@ -0,0 +1,15 @@
+#ifndef SOCKS_USER_CPU_H_
+#define SOCKS_USER_CPU_H_
+
+typedef struct ml_cpu_block {
+	int cpu_reserved;
+} ml_cpu_block;
+
+extern int ml_init_bootcpu(void);
+
+extern int ml_cpu_block_init(ml_cpu_block *p);
+extern int ml_cpu_block_use(ml_cpu_block *p);
+
+extern void ml_halt_cpu(void);
+
+#endif

arch/user/include/socks/machine/hwlock.h

@@ -0,0 +1,14 @@
+#ifndef SOCKS_USER_HWLOCK_H_
+#define SOCKS_USER_HWLOCK_H_
+
+#define ML_HWLOCK_INIT (0)
+
+typedef int ml_hwlock_t;
+
+extern void ml_hwlock_lock(ml_hwlock_t *lck);
+extern void ml_hwlock_unlock(ml_hwlock_t *lck);
+
+extern void ml_hwlock_lock_irqsave(ml_hwlock_t *lck, unsigned long *flags);
+extern void ml_hwlock_unlock_irqrestore(ml_hwlock_t *lck, unsigned long flags);
+
+#endif

arch/user/include/socks/machine/init.h

@@ -0,0 +1,8 @@
+#ifndef SOCKS_X86_64_INIT_H_
+#define SOCKS_X86_64_INIT_H_
+
+#include <stdint.h>
+
+extern int ml_init(uintptr_t arg);
+
+#endif

arch/user/include/socks/machine/irq.h

@@ -0,0 +1,5 @@
+#ifndef SOCKS_X86_64_IRQ_H_
+#define SOCKS_X86_64_IRQ_H_
+
+
+#endif

arch/user/include/socks/machine/pmap.h

@@ -0,0 +1,9 @@
+#ifndef SOCKS_X86_64_PMAP_H_
+#define SOCKS_X86_64_PMAP_H_
+
+#include <arch/paging.h>
+
+typedef pml4t_ptr_t ml_pmap_t;
+typedef uint64_t ml_pfn_t;
+
+#endif

arch/user/include/socks/machine/vm.h

@@ -0,0 +1,26 @@
+#ifndef SOCKS_USER_VM_H_
+#define SOCKS_USER_VM_H_
+
+#include <stdint.h>
+
+extern uintptr_t __pagemap_base(void);
+extern uintptr_t __pagemap_limit(void);
+
+/* kernel higher-half base virtual address. */
+#define VM_KERNEL_VOFFSET (__pagemap_base())
+
+/* direct page-mapping region.
+   NOTE that these are the maximum bounds of this region.
+   the actual size depends on the amount of physical
+   memory present. */
+#define VM_PAGEMAP_BASE   (__pagemap_base())
+#define VM_PAGEMAP_LIMIT  (__pagemap_limit())
+
+#define VM_PAGE_SIZE  0x1000
+#define VM_PAGE_MASK  (VM_PAGE_SIZE-1)
+#define VM_PAGE_SHIFT 12
+
+#define VM_PAGE_MIN_ORDER VM_PAGE_4K
+#define VM_PAGE_MAX_ORDER VM_PAGE_8M
+
+#endif