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xtensa: nommu: provide correct KIO addresses

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KIO region location is different for noMMU cores. Provide different
default physical address and make KIO virtual address equal to physical.

Move xtensa_get_kio_paddr function close to XCHAL_KIO_PADDR definition
and define it not only for MMUv3, but for all MMU options except MMUv2.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2015-09-24 23:36:45 +03:00
parent cfedf08b0c
commit 260c64bbab
3 changed files with 15 additions and 11 deletions
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9
arch/xtensa/include/asm/io.h
View File

@ -25,15 +25,6 @@
#ifdef CONFIG_MMU
#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
extern unsigned long xtensa_kio_paddr;
static inline unsigned long xtensa_get_kio_paddr(void)
{
return xtensa_kio_paddr;
}
#endif
/*
* Return the virtual address for the specified bus memory.
* Note that we currently don't support any address outside the KIO segment.

15
arch/xtensa/include/asm/vectors.h
View File

@ -21,13 +21,26 @@
#include <variant/core.h>
#include <platform/hardware.h>
#if XCHAL_HAVE_PTP_MMU
#define XCHAL_KIO_CACHED_VADDR 0xe0000000
#define XCHAL_KIO_BYPASS_VADDR 0xf0000000
#define XCHAL_KIO_DEFAULT_PADDR 0xf0000000
#else
#define XCHAL_KIO_BYPASS_VADDR XCHAL_KIO_PADDR
#define XCHAL_KIO_DEFAULT_PADDR 0x90000000
#endif
#define XCHAL_KIO_SIZE 0x10000000
#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && defined(CONFIG_OF)
#if (!XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY) && defined(CONFIG_OF)
#define XCHAL_KIO_PADDR xtensa_get_kio_paddr()
#ifndef __ASSEMBLY__
extern unsigned long xtensa_kio_paddr;
static inline unsigned long xtensa_get_kio_paddr(void)
{
return xtensa_kio_paddr;
}
#endif
#else
#define XCHAL_KIO_PADDR XCHAL_KIO_DEFAULT_PADDR
#endif

2
arch/xtensa/kernel/setup.c
View File

@ -190,7 +190,7 @@ static int __init parse_bootparam(const bp_tag_t* tag)
#ifdef CONFIG_OF
bool __initdata dt_memory_scan = false;
#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
#if !XCHAL_HAVE_PTP_MMU || XCHAL_HAVE_SPANNING_WAY
unsigned long xtensa_kio_paddr = XCHAL_KIO_DEFAULT_PADDR;
EXPORT_SYMBOL(xtensa_kio_paddr);