diff options
| author |   Michael Ellerman <michael@ellerman.id.au> | 2008-01-30 01:14:00 +1100 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2008-01-31 12:11:10 +1100 |
| commit | 7fc67afc436cf7f74d8cc697012696187332fc35 (patch) | |
| tree | 6751c3bc965a11cab95dd140cb70cba6e3988d24 /arch | |
| parent | [POWERPC] Split out the logic that allocates struct iommus (diff) | |
| download | linux-dev-7fc67afc436cf7f74d8cc697012696187332fc35.tar.xz linux-dev-7fc67afc436cf7f74d8cc697012696187332fc35.zip | |
[POWERPC] Split cell_iommu_setup_hardware() into two parts
Split cell_iommu_setup_hardware() into two parts. Split the page table
setup into cell_iommu_setup_page_tables() and the bits that kick the
hardware into cell_iommu_enable_hardware().
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 26c1bba848b6..b3655aa88ddb 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -306,20 +306,13 @@ static int cell_iommu_find_ioc(int nid, unsigned long *base) return -ENODEV; } -static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, unsigned long size) +static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, + unsigned long base, unsigned long size) { struct page *page; - int ret, i; + int i; unsigned long reg, segments, pages_per_segment, ptab_size, stab_size, - n_pte_pages, xlate_base; - unsigned int virq; - - if (cell_iommu_find_ioc(iommu->nid, &xlate_base)) - panic("%s: missing IOC register mappings for node %d\n", - __FUNCTION__, iommu->nid); - - iommu->xlate_regs = ioremap(xlate_base, IOC_Reg_Size); - iommu->cmd_regs = iommu->xlate_regs + IOC_IOCmd_Offset; + n_pte_pages; segments = size >> IO_SEGMENT_SHIFT; pages_per_segment = 1ull << IO_PAGENO_BITS; @@ -378,6 +371,20 @@ static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, unsigned long siz (__pa(iommu->ptab) + n_pte_pages * IOMMU_PAGE_SIZE * i); pr_debug("\t[%d] 0x%016lx\n", i, iommu->stab[i]); } +} + +static void cell_iommu_enable_hardware(struct cbe_iommu *iommu) +{ + int ret; + unsigned long reg, xlate_base; + unsigned int virq; + + if (cell_iommu_find_ioc(iommu->nid, &xlate_base)) + panic("%s: missing IOC register mappings for node %d\n", + __FUNCTION__, iommu->nid); + + iommu->xlate_regs = ioremap(xlate_base, IOC_Reg_Size); + iommu->cmd_regs = iommu->xlate_regs + IOC_IOCmd_Offset; /* ensure that the STEs have updated */ mb(); @@ -407,6 +414,13 @@ static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, unsigned long siz out_be64(iommu->cmd_regs + IOC_IOCmd_Cfg, reg); } +static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, + unsigned long base, unsigned long size) +{ + cell_iommu_setup_page_tables(iommu, base, size); + cell_iommu_enable_hardware(iommu); +} + #if 0/* Unused for now */ static struct iommu_window *find_window(struct cbe_iommu *iommu, unsigned long offset, unsigned long size) @@ -622,7 +636,7 @@ static void __init cell_iommu_init_one(struct device_node *np, base, base + size - 1); /* Initialize the hardware */ - cell_iommu_setup_hardware(iommu, size); + cell_iommu_setup_hardware(iommu, base, size); /* Setup the iommu_table */ cell_iommu_setup_window(iommu, np, base, size, |