On Wed, 2008-07-09 at 15:44 +0200, Stefan Roese wrote:
> This patch enables 32bit PPC's (with 36bit physical address space, e.g.
> IBM/AMCC PPC44x) to run with more than 2GB of RAM. Mostly its just
> replacing types (unsigned long -> phys_addr_t).
>
> Tested on an AMCC Katmai with 4GB of DDR2.
>
> Signed-off-by: Stefan Roese <[EMAIL PROTECTED]>
But DMAs will break no ?
Ben.
> ---
> arch/powerpc/mm/init_32.c | 4 ++--
> arch/powerpc/mm/mem.c | 8 ++++----
> arch/powerpc/mm/mmu_decl.h | 4 ++--
> 3 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
> index 1952b4d..325ccdd 100644
> --- a/arch/powerpc/mm/init_32.c
> +++ b/arch/powerpc/mm/init_32.c
> @@ -56,8 +56,8 @@
>
> DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
>
> -unsigned long total_memory;
> -unsigned long total_lowmem;
> +phys_addr_t total_memory;
> +phys_addr_t total_lowmem;
>
> phys_addr_t memstart_addr = (phys_addr_t)~0ull;
> EXPORT_SYMBOL(memstart_addr);
> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
> index 51f82d8..55ef772 100644
> --- a/arch/powerpc/mm/mem.c
> +++ b/arch/powerpc/mm/mem.c
> @@ -329,7 +329,7 @@ static int __init mark_nonram_nosave(void)
> void __init paging_init(void)
> {
> unsigned long total_ram = lmb_phys_mem_size();
> - unsigned long top_of_ram = lmb_end_of_DRAM();
> + phys_addr_t top_of_ram = lmb_end_of_DRAM();
> unsigned long max_zone_pfns[MAX_NR_ZONES];
>
> #ifdef CONFIG_PPC32
> @@ -348,10 +348,10 @@ void __init paging_init(void)
> kmap_prot = PAGE_KERNEL;
> #endif /* CONFIG_HIGHMEM */
>
> - printk(KERN_DEBUG "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
> - top_of_ram, total_ram);
> + printk(KERN_DEBUG "Top of RAM: 0x%llx, Total RAM: 0x%lx\n",
> + (u64)top_of_ram, total_ram);
> printk(KERN_DEBUG "Memory hole size: %ldMB\n",
> - (top_of_ram - total_ram) >> 20);
> + (long int)((top_of_ram - total_ram) >> 20));
> memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
> #ifdef CONFIG_HIGHMEM
> max_zone_pfns[ZONE_DMA] = lowmem_end_addr >> PAGE_SHIFT;
> diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
> index 0480225..4e46c63 100644
> --- a/arch/powerpc/mm/mmu_decl.h
> +++ b/arch/powerpc/mm/mmu_decl.h
> @@ -49,8 +49,8 @@ extern unsigned int num_tlbcam_entries;
> extern unsigned long ioremap_bot;
> extern unsigned long __max_low_memory;
> extern phys_addr_t __initial_memory_limit_addr;
> -extern unsigned long total_memory;
> -extern unsigned long total_lowmem;
> +extern phys_addr_t total_memory;
> +extern phys_addr_t total_lowmem;
> extern phys_addr_t memstart_addr;
> extern phys_addr_t lowmem_end_addr;
>
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