Revert "x86: reserve the first megabyte"

This reverts commit 51e3c9efa5.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2021-01-22 07:37:39 -05:00
commit 4422b1d376
4 changed files with 0 additions and 23 deletions

View file

@ -17,7 +17,6 @@
#include <x86_mmu.h>
#include <init.h>
#include <kernel_internal.h>
#include <mmu.h>
#include <drivers/interrupt_controller/loapic.h>
LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
@ -1776,22 +1775,3 @@ void z_x86_current_stack_perms(void)
#endif
}
#endif /* CONFIG_USERSPACE */
#ifdef CONFIG_ARCH_HAS_RESERVED_PAGE_FRAMES
/* Selected on PC-like targets at the SOC level.
*
* Best is to do some E820 or similar enumeration to specifically identify
* all page frames which are reserved by the hardware or firmware.
*
* For now, just reserve everything in the first megabyte of physical memory.
*/
void arch_reserved_pages_update(void)
{
for (uintptr_t pos = 0; pos < (1024 * 1024);
pos += CONFIG_MMU_PAGE_SIZE) {
struct z_page_frame *pf = z_phys_to_page_frame(pos);
pf->flags |= Z_PAGE_FRAME_RESERVED;
}
}
#endif /* CONFIG_ARCH_HAS_RESERVED_PAGE_FRAMES */

View file

@ -10,4 +10,3 @@ config SOC_APOLLO_LAKE
select PCIE_MSI
select DYNAMIC_INTERRUPTS
select X86_MMU
select ARCH_HAS_RESERVED_PAGE_FRAMES

View file

@ -6,4 +6,3 @@ config SOC_ATOM
select CPU_ATOM
select X86_MMU
select ARCH_HAS_USERSPACE
select ARCH_HAS_RESERVED_PAGE_FRAMES

View file

@ -4,4 +4,3 @@ config SOC_IA32
bool "Generic IA32 SoC"
select X86
select CPU_MINUTEIA
select ARCH_HAS_RESERVED_PAGE_FRAMES if SRAM_BASE_ADDRESS = 0