7cd9b317b6
Drop multiple definitions of ioremap_bot and make one common to all subarches. Only CONFIG_PPC_BOOK3E_64 had a global static init value for ioremap_bot. Now ioremap_bot is set in early_init_mmu_global(). Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/920eebfd9f36f14c79d1755847f5bf7c83703bdd.1566309262.git.christophe.leroy@c-s.fr
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/io.h>
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#include <asm/io-workarounds.h>
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unsigned long ioremap_bot;
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EXPORT_SYMBOL(ioremap_bot);
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void __iomem *ioremap(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_noncached(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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EXPORT_SYMBOL(ioremap);
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void __iomem *ioremap_wc(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_noncached_wc(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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EXPORT_SYMBOL(ioremap_wc);
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void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
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{
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pgprot_t prot = pgprot_cached(PAGE_KERNEL);
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void *caller = __builtin_return_address(0);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, prot, caller);
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return __ioremap_caller(addr, size, prot, caller);
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}
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void __iomem *ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
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{
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pte_t pte = __pte(flags);
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void *caller = __builtin_return_address(0);
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/* writeable implies dirty for kernel addresses */
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if (pte_write(pte))
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pte = pte_mkdirty(pte);
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/* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */
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pte = pte_exprotect(pte);
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pte = pte_mkprivileged(pte);
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if (iowa_is_active())
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return iowa_ioremap(addr, size, pte_pgprot(pte), caller);
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return __ioremap_caller(addr, size, pte_pgprot(pte), caller);
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}
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EXPORT_SYMBOL(ioremap_prot);
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