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qemu_x86: increase to 8MB of RAM

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Previously we were instantiating QEMU with 32MB of RAM but
only enabling a small fraction of it.

Now we boot with 8MB of ram. We ignore the first 4K so we can
make that an unmapped paged to catch NULL pointer dereferences.

If XIP is enabled, the "ROM" region will be the first half of
memory, the "RAM" region the latter.

Move the IDT_LIST and MMU_LIST regions elsewhere so they don't
overlap the new memory arrangement.

Use !XIP to fix a problem where CONFIG_RAM_SIZE was set incorrectly
for XIP case.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2017-07-05 13:59:14 -07:00 • committed by Andrew Boie
commit 103d655dee
3 changed files with 7 additions and 7 deletions
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4
arch/x86/soc/ia32/linker.ld
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@ -38,8 +38,8 @@ MEMORY
* target. However, it shouldn't overlap any other regions.
*/
IDT_LIST : ORIGIN = 2K, LENGTH = 2K
MMU_LIST : ORIGIN = 4k, LENGTH = 1K
IDT_LIST : ORIGIN = 0xFFFF1000, LENGTH = 2K
MMU_LIST : ORIGIN = 0xFFFF2000, LENGTH = 1K
}
#include <arch/x86/linker.ld>