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63 lines
1.9 KiB
63 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 |
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* |
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* Copyright (C) 1999 by Kaz Kojima |
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* |
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* Defitions for the address spaces of the SH CPUs. |
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*/ |
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#ifndef __ASM_SH_ADDRSPACE_H |
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#define __ASM_SH_ADDRSPACE_H |
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#include <cpu/addrspace.h> |
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/* If this CPU supports segmentation, hook up the helpers */ |
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#ifdef P1SEG |
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/* |
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[ P0/U0 (virtual) ] 0x00000000 <------ User space |
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[ P1 (fixed) cached ] 0x80000000 <------ Kernel space |
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[ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access |
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[ P3 (virtual) cached] 0xC0000000 <------ vmalloced area |
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[ P4 control ] 0xE0000000 |
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*/ |
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/* Returns the privileged segment base of a given address */ |
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#define PXSEG(a) (((unsigned long)(a)) & 0xe0000000) |
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#ifdef CONFIG_29BIT |
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/* |
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* Map an address to a certain privileged segment |
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*/ |
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#define P1SEGADDR(a) \ |
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((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG)) |
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#define P2SEGADDR(a) \ |
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((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG)) |
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#define P3SEGADDR(a) \ |
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((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG)) |
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#define P4SEGADDR(a) \ |
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((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG)) |
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#else |
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/* |
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* These will never work in 32-bit, don't even bother. |
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*/ |
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#define P1SEGADDR(a) ({ (void)(a); BUG(); NULL; }) |
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#define P2SEGADDR(a) ({ (void)(a); BUG(); NULL; }) |
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#define P3SEGADDR(a) ({ (void)(a); BUG(); NULL; }) |
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#define P4SEGADDR(a) ({ (void)(a); BUG(); NULL; }) |
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#endif |
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#endif /* P1SEG */ |
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/* Check if an address can be reached in 29 bits */ |
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#define IS_29BIT(a) (((unsigned long)(a)) < 0x20000000) |
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#ifdef CONFIG_SH_STORE_QUEUES |
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/* |
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* This is a special case for the SH-4 store queues, as pages for this |
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* space still need to be faulted in before it's possible to flush the |
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* store queue cache for writeout to the remapped region. |
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*/ |
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#define P3_ADDR_MAX (P4SEG_STORE_QUE + 0x04000000) |
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#else |
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#define P3_ADDR_MAX P4SEG |
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#endif |
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#endif /* __ASM_SH_ADDRSPACE_H */
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