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author | Olof Johansson <olof@lixom.net> | 2019-05-15 22:51:48 -0700 |
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committer | Olof Johansson <olof@lixom.net> | 2019-05-15 22:51:48 -0700 |
commit | 7a0c4c17089a8aff52f516f0f52002be52950aae (patch) | |
tree | 474dc451d62a1ba788ed52c4cecf93f9e50cc39a /arch/riscv/mm/init.c | |
parent | a842b514db723d7bec5e8f9e6f57e5cfbb6b1f37 (diff) | |
parent | affe2a51001450c32886f70248b57eac0f9b68ef (diff) | |
download | linux-7a0c4c17089a8aff52f516f0f52002be52950aae.tar.bz2 |
Merge branch 'fixes' into arm/soc
Merge in a few pending fixes from pre-5.1 that didn't get sent in:
MAINTAINERS: update arch/arm/mach-davinci
ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect
ARM: dts: imx6q-logicpd: Reduce inrush current on USBH1
ARM: dts: imx6q-logicpd: Reduce inrush current on start
ARM: dts: imx: Fix the AR803X phy-mode
ARM: dts: sun8i: a33: Reintroduce default pinctrl muxing
arm64: dts: allwinner: a64: Rename hpvcc-supply to cpvdd-supply
ARM: sunxi: fix a leaked reference by adding missing of_node_put
ARM: sunxi: fix a leaked reference by adding missing of_node_put
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/riscv/mm/init.c')
-rw-r--r-- | arch/riscv/mm/init.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index b379a75ac6a6..bc7b77e34d09 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -25,6 +25,10 @@ #include <asm/pgtable.h> #include <asm/io.h> +unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] + __page_aligned_bss; +EXPORT_SYMBOL(empty_zero_page); + static void __init zone_sizes_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, }; @@ -117,6 +121,14 @@ void __init setup_bootmem(void) */ memblock_reserve(reg->base, vmlinux_end - reg->base); mem_size = min(reg->size, (phys_addr_t)-PAGE_OFFSET); + + /* + * Remove memblock from the end of usable area to the + * end of region + */ + if (reg->base + mem_size < end) + memblock_remove(reg->base + mem_size, + end - reg->base - mem_size); } } BUG_ON(mem_size == 0); @@ -143,6 +155,11 @@ void __init setup_bootmem(void) } } +unsigned long va_pa_offset; +EXPORT_SYMBOL(va_pa_offset); +unsigned long pfn_base; +EXPORT_SYMBOL(pfn_base); + pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss; pgd_t trampoline_pg_dir[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE); @@ -172,6 +189,25 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot) } } +/* + * setup_vm() is called from head.S with MMU-off. + * + * Following requirements should be honoured for setup_vm() to work + * correctly: + * 1) It should use PC-relative addressing for accessing kernel symbols. + * To achieve this we always use GCC cmodel=medany. + * 2) The compiler instrumentation for FTRACE will not work for setup_vm() + * so disable compiler instrumentation when FTRACE is enabled. + * + * Currently, the above requirements are honoured by using custom CFLAGS + * for init.o in mm/Makefile. + */ + +#ifndef __riscv_cmodel_medany +#error "setup_vm() is called from head.S before relocate so it should " + "not use absolute addressing." +#endif + asmlinkage void __init setup_vm(void) { extern char _start; |