hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

sh: nommu: use 32-bit phys mode. 

The nommu code has regressed somewhat in that 29BIT gets set for the
SH-2/2A configs regardless of the fact that they are really 32BIT sans
MMU or PMB. This does a bit of tidying to get nommu properly selecting
32BIT as it was before.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-11-04 12:32:24 +09:00
parent e96ce8ebfd
commit e2fcf74f3d
5 changed files with 14 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/sh/Kconfig
View File

@ -193,6 +193,7 @@ config CPU_SH2
config CPU_SH2A
bool
select CPU_SH2
select UNCACHED_MAPPING
config CPU_SH3
bool

8
arch/sh/include/asm/addrspace.h
View File

@ -44,10 +44,10 @@
/*
* These will never work in 32-bit, don't even bother.
*/
#define P1SEGADDR(a) __futile_remapping_attempt
#define P2SEGADDR(a) __futile_remapping_attempt
#define P3SEGADDR(a) __futile_remapping_attempt
#define P4SEGADDR(a) __futile_remapping_attempt
#define P1SEGADDR(a) ({ (void)(a); BUG(); NULL; })
#define P2SEGADDR(a) ({ (void)(a); BUG(); NULL; })
#define P3SEGADDR(a) ({ (void)(a); BUG(); NULL; })
#define P4SEGADDR(a) ({ (void)(a); BUG(); NULL; })
#endif
#endif /* P1SEG */

2
arch/sh/mm/Kconfig
View File

@ -79,7 +79,7 @@ config 29BIT
config 32BIT
bool
default y if CPU_SH5
default y if CPU_SH5 || !MMU
config PMB
bool "Support 32-bit physical addressing through PMB"

15
arch/sh/mm/consistent.c
View File

@ -79,21 +79,20 @@ void dma_generic_free_coherent(struct device *dev, size_t size,
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
#if defined(CONFIG_CPU_SH5) || defined(CONFIG_PMB)
void *p1addr = vaddr;
#else
void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
#endif
void *addr;
addr = __in_29bit_mode() ?
(void *)P1SEGADDR((unsigned long)vaddr) : vaddr;
switch (direction) {
case DMA_FROM_DEVICE: /* invalidate only */
__flush_invalidate_region(p1addr, size);
__flush_invalidate_region(addr, size);
break;
case DMA_TO_DEVICE: /* writeback only */
__flush_wback_region(p1addr, size);
__flush_wback_region(addr, size);
break;
case DMA_BIDIRECTIONAL: /* writeback and invalidate */
__flush_purge_region(p1addr, size);
__flush_purge_region(addr, size);
break;
default:
BUG();

2
arch/sh/mm/uncached.c
View File

@ -28,7 +28,7 @@ EXPORT_SYMBOL(virt_addr_uncached);
void __init uncached_init(void)
{
#ifdef CONFIG_29BIT
#if defined(CONFIG_29BIT) || !defined(CONFIG_MMU)
uncached_start = P2SEG;
#else
uncached_start = memory_end;