-/* See COPYRIGHT for copyright information. */
+/* See COPYRIGHT for copyright information.
+ * Inlines, macros, and most function prototypes (c) the JOS project.
+ *
+ * Actual implementation:
+ * Copyright (c) 2009 The Regents of the University of California
+ * Barret Rhoden <brho@cs.berkeley.edu>
+ * See LICENSE for details.
+ *
+ * Physical memory mangement, low-level virtual address space initialization and
+ * management, and other things related to virtual->physical mappings.
+ */
#ifndef ROS_KERN_PMAP_H
#define ROS_KERN_PMAP_H
-#ifndef ROS_KERNEL
-# error "This is a ROS kernel header; user programs should not #include it"
-#endif
#include <ros/memlayout.h>
#include <sys/queue.h>
#include <assert.h>
#include <page_alloc.h>
#include <multiboot.h>
+#include <arch/pmap.h>
/* This macro takes a kernel virtual address -- an address that points above
* KERNBASE, where the machine's maximum 256MB of physical memory is mapped --
*/
#define PADDR(kva) \
({ \
- physaddr_t __m_kva = (physaddr_t) (kva); \
+ physaddr_t __m_pa, __m_kva = (physaddr_t) (kva); \
if (__m_kva < KERNBASE) \
- panic("PADDR called with invalid kva %08lx", __m_kva);\
- __m_kva - KERNBASE; \
+ panic("PADDR called with invalid kva %p", __m_kva);\
+ if(__m_kva >= KERN_LOAD_ADDR) \
+ __m_pa = __m_kva - KERN_LOAD_ADDR; \
+ else \
+ __m_pa = __m_kva - KERNBASE; \
+ __m_pa; \
})
+#define paddr_low32(p) ((uint32_t)(uintptr_t)PADDR(p))
+#define paddr_high32(p) ((uint32_t)((uint64_t)PADDR(p) >> 32))
+
/* This macro takes a physical address and returns the corresponding kernel
* virtual address. It warns if you pass an invalid physical address. */
#define KADDR(pa) \
({ \
physaddr_t __m_pa = (pa); \
- size_t __m_ppn = PPN(__m_pa); \
- if (__m_ppn >= npages) \
- warn("KADDR called with invalid pa %08lx", __m_pa);\
+ size_t __m_ppn = LA2PPN(__m_pa); \
+ if (__m_ppn > max_nr_pages) \
+ warn("KADDR called with invalid pa %p", __m_pa);\
(void*TRUSTED) (__m_pa + KERNBASE); \
})
-extern char (SNT bootstacktop)[], (SNT bootstack)[];
+#define KADDR_NOCHECK(pa) ((void*)(pa + KERNBASE))
+#define KBASEADDR(kla) KADDR(PADDR(kla))
+
+extern char (SNT RO bootstacktop)[], (SNT RO bootstack)[];
+
+extern physaddr_t max_pmem; /* Total amount of physical memory */
+extern size_t max_nr_pages; /* Total number of physical memory pages */
+extern physaddr_t max_paddr; /* Maximum addressable physical address */
+extern size_t nr_free_pages;
+extern struct multiboot_info *multiboot_kaddr;
+extern uintptr_t boot_freemem;
+extern uintptr_t boot_freelimit;
-extern page_t *COUNT(npages) pages; // List of pysical pages
+/* Pages are stored in an array, including for pages that we can never touch
+ * (like reserved memory from the BIOS, fake regions, etc). Pages are reference
+ * counted, and free pages are kept on a linked list. */
+extern struct page *pages;
-extern physaddr_t boot_cr3;
-extern pde_t *COUNT(NPDENTRIES) boot_pgdir;
+extern physaddr_t RO boot_cr3;
+extern pde_t *CT(NPDENTRIES) RO boot_pgdir;
-extern char*BND(end, maxaddrpa_ptr + IVY_KERNBASE) boot_freemem;
+bool enable_pse(void);
+void vm_init(void);
-void multiboot_detect_memory(multiboot_info_t *COUNT(1) mbi);
-void multiboot_print_memory_map(multiboot_info_t *COUNT(1) mbi);
-bool enable_pse(void);
-void vm_init(void);
+void pmem_init(struct multiboot_info *mbi);
+void *boot_alloc(size_t amt, size_t align);
+void *boot_zalloc(size_t amt, size_t align);
-void page_init(void);
-void page_check(void);
-int page_insert(pde_t *COUNT(NPDENTRIES) pgdir, page_t *pp, void *SNT va, int perm);
-void*COUNT(PGSIZE) page_insert_in_range(pde_t *COUNT(NPDENTRIES) pgdir, page_t *pp,
- void *SNT vab, void *SNT vae, int perm);
-void page_remove(pde_t *COUNT(NPDENTRIES) pgdir, void *SNT va);
-page_t*COUNT(1) page_lookup(pde_t *COUNT(NPDENTRIES) pgdir, void *SNT va, pte_t **pte_store);
+void page_check(void);
+int page_insert(pde_t *pgdir, struct page *page, void *SNT va, int perm);
+void page_remove(pde_t *COUNT(NPDENTRIES) pgdir, void *SNT va);
+page_t*COUNT(1) page_lookup(pde_t SSOMELOCK*COUNT(NPDENTRIES) pgdir, void *SNT va, pte_t **pte_store);
error_t pagetable_remove(pde_t *COUNT(NPDENTRIES) pgdir, void *SNT va);
void page_decref(page_t *COUNT(1) pp);
-void setup_default_mtrrs(barrier_t* smp_barrier);
void tlb_invalidate(pde_t *COUNT(NPDENTRIES) pgdir, void *SNT va);
void tlb_flush_global(void);
+bool regions_collide_unsafe(uintptr_t start1, uintptr_t end1,
+ uintptr_t start2, uintptr_t end2);
-void * (DALLOC(len) user_mem_check) (env_t *env, const void *DANGEROUS va,
- size_t len, int perm);
-
-void * (DALLOC(len) user_mem_assert)(env_t *env, const void *DANGEROUS va,
- size_t len, int perm);
-
-size_t user_mem_strlcpy(env_t *env, char *NT COUNT(len - 1),
- const char *DANGEROUS va, size_t len, int perm);
-
-error_t
-memcpy_from_user(env_t* env, void* COUNT(len) dest,
- const void *DANGEROUS va, size_t len);
-
-pte_t *pgdir_walk(pde_t *COUNT(NPDENTRIES) pgdir, const void *SNT va, int create);
+/* Arch specific implementations for these */
+pte_t *pgdir_walk(pde_t *COUNT(NPDENTRIES) pgdir, const void *SNT va, int create);
+int get_va_perms(pde_t *COUNT(NPDENTRIES) pgdir, const void *SNT va);
static inline page_t *SAFE ppn2page(size_t ppn)
{
- if( ppn >= npages )
- warn("ppn2page called with ppn (%08u) larger than npages", ppn);
+ if (ppn >= max_nr_pages)
+ warn("ppn2page called with ppn (%08lu) larger than max_nr_pages", ppn);
return &(pages[ppn]);
}
static inline page_t*COUNT(1) pa2page(physaddr_t pa)
{
- if (PPN(pa) >= npages)
- warn("pa2page called with pa (0x%08x) larger than npages", pa);
- return &pages[PPN(pa)];
+ if (LA2PPN(pa) >= max_nr_pages)
+ warn("pa2page called with pa (%p) larger than max_nr_pages", pa);
+ return &pages[LA2PPN(pa)];
+}
+
+static inline ppn_t pa2ppn(physaddr_t pa)
+{
+ return pa >> PGSHIFT;
}
static inline void*COUNT(PGSIZE) page2kva(page_t *pp)
return pa2page(PADDR(addr));
}
+static inline ppn_t kva2ppn(void* addr)
+{
+ return page2ppn(kva2page(addr));
+}
+
+static inline bool is_kaddr(void *addr)
+{
+ return (uintptr_t)addr >= KERNBASE;
+}
+
#endif /* !ROS_KERN_PMAP_H */
projects / akaros.git / blobdiff