65d37f163a
In order to be usable for early boot code move the simple arch_set_page_dat() function to header file, and add its counter-part arch_set_page_nodat(). Also change the parameters, and the function name slightly. This is required since there aren't any struct pages available in early boot code, and renaming of functions is done to make sure that all users are converted to the new API. Instead of a pointer to a struct page a virtual address is passed, and instead of an order the number of pages for which the page state needs be set. Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2017
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* Author(s): Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
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*/
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#ifndef PAGE_STATES_H
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#define PAGE_STATES_H
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#include <asm/sections.h>
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#include <asm/page.h>
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#define ESSA_GET_STATE 0
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#define ESSA_SET_STABLE 1
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#define ESSA_SET_UNUSED 2
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#define ESSA_SET_VOLATILE 3
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#define ESSA_SET_POT_VOLATILE 4
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#define ESSA_SET_STABLE_RESIDENT 5
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#define ESSA_SET_STABLE_IF_RESIDENT 6
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#define ESSA_SET_STABLE_NODAT 7
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#define ESSA_MAX ESSA_SET_STABLE_NODAT
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extern int __bootdata_preserved(cmma_flag);
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static __always_inline unsigned long essa(unsigned long paddr, unsigned char cmd)
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{
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unsigned long rc;
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asm volatile(
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" .insn rrf,0xb9ab0000,%[rc],%[paddr],%[cmd],0"
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: [rc] "=d" (rc)
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: [paddr] "d" (paddr),
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[cmd] "i" (cmd));
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return rc;
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}
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static __always_inline void __set_page_state(void *addr, unsigned long num_pages, unsigned char cmd)
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{
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unsigned long paddr = __pa(addr) & PAGE_MASK;
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while (num_pages--) {
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essa(paddr, cmd);
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paddr += PAGE_SIZE;
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}
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}
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static inline void __set_page_unused(void *addr, unsigned long num_pages)
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{
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__set_page_state(addr, num_pages, ESSA_SET_UNUSED);
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}
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static inline void __set_page_stable_dat(void *addr, unsigned long num_pages)
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{
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__set_page_state(addr, num_pages, ESSA_SET_STABLE);
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}
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static inline void __set_page_stable_nodat(void *addr, unsigned long num_pages)
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{
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__set_page_state(addr, num_pages, ESSA_SET_STABLE_NODAT);
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}
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static inline void __arch_set_page_nodat(void *addr, unsigned long num_pages)
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{
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if (!cmma_flag)
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return;
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if (cmma_flag < 2)
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__set_page_stable_dat(addr, num_pages);
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else
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__set_page_stable_nodat(addr, num_pages);
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}
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static inline void __arch_set_page_dat(void *addr, unsigned long num_pages)
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{
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if (!cmma_flag)
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return;
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__set_page_stable_dat(addr, num_pages);
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}
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#endif
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