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sparc32: fix sparse warning in iommu.c

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Fix following warning:
iommu.c:69:21: warning: incorrect type in assignment (different address spaces)

iommu_struct.regs is __iomem - fix up all users.
Introduce sbus operations for all read/write operations.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sam Ravnborg 2014-05-16 23:25:40 +02:00 committed by David S. Miller
parent 178f0ffa63
commit f977ea49ae
2 changed files with 18 additions and 12 deletions
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10
arch/sparc/include/asm/iommu_32.h
View File

@ -99,7 +99,7 @@ struct iommu_regs {
#define IOPTE_WAZ 0x00000001 /* Write as zeros */
struct iommu_struct {
struct iommu_regs *regs;
struct iommu_regs __iomem *regs;
iopte_t *page_table;
/* For convenience */
unsigned long start; /* First managed virtual address */
@ -108,14 +108,14 @@ struct iommu_struct {
struct bit_map usemap;
};
static inline void iommu_invalidate(struct iommu_regs *regs)
static inline void iommu_invalidate(struct iommu_regs __iomem *regs)
{
regs->tlbflush = 0;
sbus_writel(0, &regs->tlbflush);
}
static inline void iommu_invalidate_page(struct iommu_regs *regs, unsigned long ba)
static inline void iommu_invalidate_page(struct iommu_regs __iomem *regs, unsigned long ba)
{
regs->pageflush = (ba & PAGE_MASK);
sbus_writel(ba & PAGE_MASK, &regs->pageflush);
}
#endif /* !(_SPARC_IOMMU_H) */

20
arch/sparc/mm/iommu.c
View File

@ -58,6 +58,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
struct iommu_struct *iommu;
unsigned int impl, vers;
unsigned long *bitmap;
unsigned long control;
unsigned long base;
unsigned long tmp;
iommu = kmalloc(sizeof(struct iommu_struct), GFP_KERNEL);
@ -72,12 +74,14 @@ static void __init sbus_iommu_init(struct platform_device *op)
prom_printf("Cannot map IOMMU registers\n");
prom_halt();
}
impl = (iommu->regs->control & IOMMU_CTRL_IMPL) >> 28;
vers = (iommu->regs->control & IOMMU_CTRL_VERS) >> 24;
tmp = iommu->regs->control;
tmp &= ~(IOMMU_CTRL_RNGE);
tmp |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
iommu->regs->control = tmp;
control = sbus_readl(&iommu->regs->control);
impl = (control & IOMMU_CTRL_IMPL) >> 28;
vers = (control & IOMMU_CTRL_VERS) >> 24;
control &= ~(IOMMU_CTRL_RNGE);
control |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
sbus_writel(control, &iommu->regs->control);
iommu_invalidate(iommu->regs);
iommu->start = IOMMU_START;
iommu->end = 0xffffffff;
@ -99,7 +103,9 @@ static void __init sbus_iommu_init(struct platform_device *op)
memset(iommu->page_table, 0, IOMMU_NPTES*sizeof(iopte_t));
flush_cache_all();
flush_tlb_all();
iommu->regs->base = __pa((unsigned long) iommu->page_table) >> 4;
base = __pa((unsigned long)iommu->page_table) >> 4;
sbus_writel(base, &iommu->regs->base);
iommu_invalidate(iommu->regs);
bitmap = kmalloc(IOMMU_NPTES>>3, GFP_KERNEL);