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iommu/exynos: Refactor init config code 

This patch rewrites sysmmu_init_config function to make it easier to read
and understand.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2016-02-18 15:12:54 +01:00 committed by Joerg Roedel
parent d093fc7e83
commit 83addecdb7
1 changed files with 8 additions and 15 deletions
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23
drivers/iommu/exynos-iommu.c
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@ -383,24 +383,17 @@ static bool __sysmmu_disable(struct sysmmu_drvdata *data)
static void __sysmmu_init_config(struct sysmmu_drvdata *data)
{
unsigned int cfg = CFG_LRU | CFG_QOS(15);
unsigned int ver;
unsigned int cfg;
ver = MMU_RAW_VER(__raw_readl(data->sfrbase + REG_MMU_VERSION));
if (MMU_MAJ_VER(ver) == 3) {
if (MMU_MIN_VER(ver) >= 2) {
cfg |= CFG_FLPDCACHE;
if (MMU_MIN_VER(ver) == 3) {
cfg |= CFG_ACGEN;
cfg &= ~CFG_LRU;
} else {
cfg |= CFG_SYSSEL;
}
}
}
data->version = MMU_RAW_VER(__raw_readl(data->sfrbase + REG_MMU_VERSION));
if (data->version <= MAKE_MMU_VER(3, 1))
cfg = CFG_LRU | CFG_QOS(15);
else if (data->version <= MAKE_MMU_VER(3, 2))
cfg = CFG_LRU | CFG_QOS(15) | CFG_FLPDCACHE | CFG_SYSSEL;
else
cfg = CFG_QOS(15) | CFG_FLPDCACHE | CFG_ACGEN;
__raw_writel(cfg, data->sfrbase + REG_MMU_CFG);
data->version = ver;
}
static void __sysmmu_enable_nocount(struct sysmmu_drvdata *data)