From 7f15a256b556bf26780d7a0bd03c88914a852022 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 6 Nov 2013 16:36:08 +0100 Subject: 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: Michal Simek Upstream-Status: Backport --- diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index d8ec74b..655e1ca 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -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" diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S index fcc797f..817b7ee 100644 --- a/arch/microblaze/kernel/head.S +++ b/arch/microblaze/kernel/head.S @@ -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 */ --