blob: 798621e24ee98c093689686f15762cd24f0d643d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// Physical memory layout
// qemu -machine virt is set up like this:
// 00001000 -- boot ROM, provided by qemu
// 10000000 -- uart0 registers
// 80000000 -- boot ROM jumps here in machine mode
// unused RAM after 80000000.
// the kernel uses physical memory thus:
// 80000000 -- entry.S, then kernel text and data
// end -- start of kernel page allocation area
// PHYSTOP -- end RAM used by the kernel
// registers start here in physical memory.
#define UART0 0x10000000L
// the kernel expects there to be RAM
// for use by the kernel and user pages
// from physical address 0x80000000 to PHYSTOP.
#define KERNBASE 0x80000000L
#define PHYSTOP (KERNBASE + 64*1024*1024)
// map the trampoline page to the highest address,
// in both user and kernel space.
#define TRAMPOLINE (MAXVA - PGSIZE)
|
