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authorChristophe Leroy2019-09-12 13:49:43 +0000
committerMichael Ellerman2019-11-19 19:38:38 +1100
commit265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 (patch)
treecfb99d01bb76d928b00433d8311c45765db8fb12 /arch/powerpc/include/asm
parent77693a5fb57be4606a6024ec8e3076f9499b906b (diff)
powerpc: Add support for GENERIC_EARLY_IOREMAP
Add support for GENERIC_EARLY_IOREMAP. Let's define 16 slots of 256Kbytes each for early ioremap. 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/412c7eaa6a373d8f82a3c3ee01e6a65a1a6589de.1568295907.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/include/asm')
-rw-r--r--arch/powerpc/include/asm/Kbuild1
-rw-r--r--arch/powerpc/include/asm/fixmap.h12
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 8dbf85d5da0e..148bee20e7e2 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -12,3 +12,4 @@ generic-y += mcs_spinlock.h
generic-y += preempt.h
generic-y += vtime.h
generic-y += msi.h
+generic-y += early_ioremap.h
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index 722289a1d000..d5c4d357bd33 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -15,6 +15,7 @@
#define _ASM_FIXMAP_H
#ifndef __ASSEMBLY__
+#include <linux/sizes.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#ifdef CONFIG_HIGHMEM
@@ -64,6 +65,14 @@ enum fixed_addresses {
FIX_IMMR_SIZE,
#endif
/* FIX_PCIE_MCFG, */
+ __end_of_permanent_fixed_addresses,
+
+#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
+#define FIX_BTMAPS_SLOTS 16
+#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
+
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
__end_of_fixed_addresses
};
@@ -71,6 +80,7 @@ enum fixed_addresses {
#define FIXADDR_START (FIXADDR_TOP - __FIXADDR_SIZE)
#define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NCG
+#define FIXMAP_PAGE_IO PAGE_KERNEL_NCG
#include <asm-generic/fixmap.h>
@@ -85,5 +95,7 @@ static inline void __set_fixmap(enum fixed_addresses idx,
map_kernel_page(__fix_to_virt(idx), phys, flags);
}
+#define __early_set_fixmap __set_fixmap
+
#endif /* !__ASSEMBLY__ */
#endif