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xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START

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Drop PLATFORM_DEFAULT_MEM_START from the platform/hardware.h headers.
Provide definition of CONFIG_DEFAULT_MEM_START always, allow changing it
only in noMMU configurations when PLATFORM_WANT_DEFAULT_MEM is selected.
Change prompt and description so that it's clear that it controls
PAGE_OFFSET and PHYS_OFFSET.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2018-08-13 16:45:54 -07:00
parent f79e4d5f92
commit aea731c81f
5 changed files with 8 additions and 30 deletions
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13
arch/xtensa/Kconfig
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@ -530,14 +530,13 @@ config PLATFORM_WANT_DEFAULT_MEM
def_bool n
config DEFAULT_MEM_START
hex "Physical address of the default memory area start"
depends on PLATFORM_WANT_DEFAULT_MEM
default 0x00000000 if MMU
default 0x60000000 if !MMU
hex
prompt "PAGE_OFFSET/PHYS_OFFSET" if !MMU && PLATFORM_WANT_DEFAULT_MEM
default 0x60000000 if PLATFORM_WANT_DEFAULT_MEM
default 0x00000000
help
This is the base address of the default memory area.
Default memory area has platform-specific meaning, it may be used
for e.g. early cache initialization.
This is the base address used for both PAGE_OFFSET and PHYS_OFFSET
in noMMU configurations.
If unsure, leave the default value here.

5
arch/xtensa/include/asm/page.h
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@ -14,7 +14,6 @@
#include <asm/processor.h>
#include <asm/types.h>
#include <asm/cache.h>
#include <platform/hardware.h>
#include <asm/kmem_layout.h>
/*
@ -31,8 +30,8 @@
#define MAX_LOW_PFN (PHYS_PFN(XCHAL_KSEG_PADDR) + \
PHYS_PFN(XCHAL_KSEG_SIZE))
#else
#define PAGE_OFFSET PLATFORM_DEFAULT_MEM_START
#define PHYS_OFFSET PLATFORM_DEFAULT_MEM_START
#define PAGE_OFFSET _AC(CONFIG_DEFAULT_MEM_START, UL)
#define PHYS_OFFSET _AC(CONFIG_DEFAULT_MEM_START, UL)
#define MAX_LOW_PFN PHYS_PFN(0xfffffffful)
#endif

10
arch/xtensa/platforms/iss/include/platform/hardware.h
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@ -15,14 +15,4 @@
#ifndef _XTENSA_PLATFORM_ISS_HARDWARE_H
#define _XTENSA_PLATFORM_ISS_HARDWARE_H
/*
* Memory configuration.
*/
#define PLATFORM_DEFAULT_MEM_START 0x00000000
/*
* Interrupt configuration.
*/
#endif /* _XTENSA_PLATFORM_ISS_HARDWARE_H */

6
arch/xtensa/platforms/xt2000/include/platform/hardware.h
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@ -17,12 +17,6 @@
#include <variant/core.h>
/*
* Memory configuration.
*/
#define PLATFORM_DEFAULT_MEM_START 0x00000000
/*
* Number of platform IRQs
*/

4
arch/xtensa/platforms/xtfpga/include/platform/hardware.h
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@ -17,10 +17,6 @@
#ifndef __XTENSA_XTAVNET_HARDWARE_H
#define __XTENSA_XTAVNET_HARDWARE_H
/* Memory configuration. */
#define PLATFORM_DEFAULT_MEM_START __XTENSA_UL(CONFIG_DEFAULT_MEM_START)
/* Interrupt configuration. */
#define PLATFORM_NR_IRQS 0