1 // Copyright 2016 The Fuchsia Authors
2 // Copyright (c) 2014 Travis Geiselbrecht
3 //
4 // Use of this source code is governed by a MIT-style
5 // license that can be found in the LICENSE file or at
6 // https://opensource.org/licenses/MIT
7
8 #include <err.h>
9 #include <inttypes.h>
10 #include <lib/console.h>
11 #include <stdio.h>
12 #include <string.h>
13 #include <trace.h>
14 #include <vm/page.h>
15 #include <vm/physmap.h>
16 #include <vm/pmm.h>
17 #include <vm/vm.h>
18
19 #define LOCAL_TRACE 0
20
page_state_to_string(unsigned int state)21 const char* page_state_to_string(unsigned int state) {
22 switch (state) {
23 case VM_PAGE_STATE_FREE:
24 return "free";
25 case VM_PAGE_STATE_ALLOC:
26 return "alloc";
27 case VM_PAGE_STATE_WIRED:
28 return "wired";
29 case VM_PAGE_STATE_HEAP:
30 return "heap";
31 case VM_PAGE_STATE_OBJECT:
32 return "object";
33 case VM_PAGE_STATE_MMU:
34 return "mmu";
35 case VM_PAGE_STATE_IPC:
36 return "ipc";
37 default:
38 return "unknown";
39 }
40 }
41
dump() const42 void vm_page::dump() const {
43 printf("page %p: address %#" PRIxPTR " state %s flags %#x\n", this, paddr(),
44 page_state_to_string(state), flags);
45 }
46
cmd_vm_page(int argc,const cmd_args * argv,uint32_t flags)47 static int cmd_vm_page(int argc, const cmd_args* argv, uint32_t flags) {
48 if (argc < 2) {
49 notenoughargs:
50 printf("not enough arguments\n");
51 usage:
52 printf("usage:\n");
53 printf("%s dump <address>\n", argv[0].str);
54 printf("%s hexdump <address>\n", argv[0].str);
55 return ZX_ERR_INTERNAL;
56 }
57
58 if (!strcmp(argv[1].str, "dump")) {
59 if (argc < 2) {
60 goto notenoughargs;
61 }
62
63 vm_page* page = reinterpret_cast<vm_page*>(argv[2].u);
64
65 page->dump();
66 } else if (!strcmp(argv[1].str, "hexdump")) {
67 if (argc < 2) {
68 goto notenoughargs;
69 }
70
71 vm_page* page = reinterpret_cast<vm_page*>(argv[2].u);
72
73 paddr_t pa = page->paddr();
74 void* ptr = paddr_to_physmap(pa);
75 if (!ptr) {
76 printf("bad page or page not mapped in kernel space\n");
77 return -1;
78 }
79 hexdump(ptr, PAGE_SIZE);
80 } else {
81 printf("unknown command\n");
82 goto usage;
83 }
84
85 return ZX_OK;
86 }
87
88 STATIC_COMMAND_START
89 #if LK_DEBUGLEVEL > 0
90 STATIC_COMMAND("vm_page", "vm_page debug commands", &cmd_vm_page)
91 #endif
92 STATIC_COMMAND_END(vm_page);
93