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Commit 7f15a256 authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Calculate kernel pad automatically 



The kernel needs to setup the first two tlbs with pad
which is used for early page allocation which is used
by mapin_ram() to allocate tables for lowmem memory
before memory initialisation is done.
Calculate pad directly from lowmem size.

Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
parent edf6844e

arch/microblaze/Kconfig

+0 −4
Original line number Diff line number Diff line
@@ -245,10 +245,6 @@ config MICROBLAZE_64K_PAGES 


endchoice



config KERNEL_PAD

	hex "Kernel PAD for unpacking" if ADVANCED_OPTIONS

	default "0x80000" if MMU



endmenu



source "mm/Kconfig"

arch/microblaze/kernel/head.S

+1 −1
Original line number Diff line number Diff line
@@ -176,7 +176,7 @@ _invalidate: 
	/* start to do TLB calculation */

	addik	r12, r0, _end

	rsub	r12, r3, r12

	addik	r12, r12, CONFIG_KERNEL_PAD /* that's the pad */

	addik	r12, r12, CONFIG_LOWMEM_SIZE >> PTE_SHIFT /* that's the pad */



	or r9, r0, r0 /* TLB0 = 0 */

	or r10, r0, r0 /* TLB1 = 0 */