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Map heap descriptors

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This commit is contained in:
Stephen Marz 2019-10-12 00:11:24 -04:00
parent 86d1fa858b
commit 88f5cb514f
1 changed files with 9 additions and 0 deletions
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9
risc_v/ch3/src/lib.rs
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@ -87,6 +87,8 @@ extern "C" {
static BSS_END: usize; static BSS_END: usize;
static KERNEL_STACK_START: usize; static KERNEL_STACK_START: usize;
static KERNEL_STACK_END: usize; static KERNEL_STACK_END: usize;
static HEAP_START: usize;
static HEAP_SIZE: usize;
static mut KERNEL_TABLE: usize; static mut KERNEL_TABLE: usize;
} }
/// Identity map range /// Identity map range
@ -143,6 +145,13 @@ extern "C" fn kinit() -> usize {
page::EntryBits::ReadWrite.val(), page::EntryBits::ReadWrite.val(),
); );
unsafe { unsafe {
// Map heap descriptors
let num_pages = HEAP_SIZE / page::PAGE_SIZE;
id_map_range(&mut root,
HEAP_START,
HEAP_START + num_pages,
page::EntryBits::ReadWrite.val()
);
// Map executable section // Map executable section
id_map_range( id_map_range(
&mut root, &mut root,