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Date: Sun, 14 Nov 2010 10:13:38 +0000 From: Catalin Marinas <catalin.marinas@....com> To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 08/20] ARM: LPAE: MMU setup for the 3-level page table format On 12 November 2010 18:00, Catalin Marinas <catalin.marinas@....com> wrote: > This patch adds the MMU initialisation for the LPAE page table format. > The swapper_pg_dir size with LPAE is 5 rather than 4 pages. The > __v7_setup function configures the TTBRx split based on the PAGE_OFFSET > and sets the corresponding TTB control and MAIRx bits (similar to > PRRR/NMRR for TEX remapping). The 36-bit mappings (supersections) and > a few other memory types in mmu.c are conditionally compiled. [...] > --- a/arch/arm/kernel/head.S > +++ b/arch/arm/kernel/head.S > @@ -45,11 +46,20 @@ > #error KERNEL_RAM_VADDR must start at 0xXXXX8000 > #endif > > +#ifdef CONFIG_ARM_LPAE > + /* LPAE requires an additional page for the PGD */ > +#define PG_DIR_SIZE 0x5000 > +#define PTE_WORDS 3 > +#else > +#define PG_DIR_SIZE 0x4000 > +#define PTE_WORDS 2 > +#endif This should have been called PTE_ORDER, the PTE_WORDS naming is misleading. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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