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authorChristophe Leroy <christophe.leroy@c-s.fr>2016-05-17 09:02:43 +0200
committerScott Wood <oss@buserror.net>2016-07-09 02:02:48 -0500
commitf86ef74ed9193c52411277eeac2eec69af553392 (patch)
tree84c8ad083c2efc3a0688e56ab906cc49b2cc6e1d /arch/powerpc/sysdev
parentpowerpc32: provide VIRT_CPU_ACCOUNTING (diff)
downloadlinux-dev-f86ef74ed9193c52411277eeac2eec69af553392.tar.xz
linux-dev-f86ef74ed9193c52411277eeac2eec69af553392.zip
powerpc/8xx: Fix vaddr for IMMR early remap
Memory: 124428K/131072K available (3748K kernel code, 188K rwdata, 648K rodata, 508K init, 290K bss, 6644K reserved) Kernel virtual memory layout: * 0xfffdf000..0xfffff000 : fixmap * 0xfde00000..0xfe000000 : consistent mem * 0xfddf6000..0xfde00000 : early ioremap * 0xc9000000..0xfddf6000 : vmalloc & ioremap SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Today, IMMR is mapped 1:1 at startup Mapping IMMR 1:1 is just wrong because it may overlap with another area. On most mpc8xx boards it is OK as IMMR is set to 0xff000000 but for instance on EP88xC board, IMMR is at 0xfa200000 which overlaps with VM ioremap area This patch fixes the virtual address for remapping IMMR with the fixmap regardless of the value of IMMR. The size of IMMR area is 256kbytes (CPM at offset 0, security engine at offset 128k) so a 512k page is enough Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/cpm_common.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index 0ac12e5fd8ab..911456d17713 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -28,6 +28,7 @@
#include <asm/udbg.h>
#include <asm/io.h>
#include <asm/cpm.h>
+#include <asm/fixmap.h>
#include <soc/fsl/qe/qe.h>
#include <mm/mmu_decl.h>
@@ -37,25 +38,36 @@
#endif
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
-static u32 __iomem *cpm_udbg_txdesc =
- (u32 __iomem __force *)CONFIG_PPC_EARLY_DEBUG_CPM_ADDR;
+static u32 __iomem *cpm_udbg_txdesc;
+static u8 __iomem *cpm_udbg_txbuf;
static void udbg_putc_cpm(char c)
{
- u8 __iomem *txbuf = (u8 __iomem __force *)in_be32(&cpm_udbg_txdesc[1]);
-
if (c == '\n')
udbg_putc_cpm('\r');
while (in_be32(&cpm_udbg_txdesc[0]) & 0x80000000)
;
- out_8(txbuf, c);
+ out_8(cpm_udbg_txbuf, c);
out_be32(&cpm_udbg_txdesc[0], 0xa0000001);
}
void __init udbg_init_cpm(void)
{
+#ifdef CONFIG_PPC_8xx
+ cpm_udbg_txdesc = (u32 __iomem __force *)
+ (CONFIG_PPC_EARLY_DEBUG_CPM_ADDR - PHYS_IMMR_BASE +
+ VIRT_IMMR_BASE);
+ cpm_udbg_txbuf = (u8 __iomem __force *)
+ (in_be32(&cpm_udbg_txdesc[1]) - PHYS_IMMR_BASE +
+ VIRT_IMMR_BASE);
+#else
+ cpm_udbg_txdesc = (u32 __iomem __force *)
+ CONFIG_PPC_EARLY_DEBUG_CPM_ADDR;
+ cpm_udbg_txbuf = (u8 __iomem __force *)in_be32(&cpm_udbg_txdesc[1]);
+#endif
+
if (cpm_udbg_txdesc) {
#ifdef CONFIG_CPM2
setbat(1, 0xf0000000, 0xf0000000, 1024*1024, PAGE_KERNEL_NCG);