linux-dev/arch/loongarch/pci, branch masterLinux kernel development work - see feature brancheshttps://git.zx2c4.com/linux-dev/atom/arch/loongarch/pci?h=master2022-10-12T08:36:14ZLoongArch: Use TLB for ioremap()2022-10-12T08:36:14ZHuacai Chenchenhuacai@loongson.cn2022-10-12T08:36:14Zurn:sha1:d279134168c78ac2caa1f7cd2a846579da1c93ac
We can support more cache attributes (e.g., CC, SUC and WUC) and page
protection when we use TLB for ioremap(). The implementation is based
on GENERIC_IOREMAP.
The existing simple ioremap() implementation has better performance so
we keep it and introduce ARCH_IOREMAP to control the selection.
We move pagetable_init() earlier to make early ioremap() works, and we
modify the PCI ecam mapping because the TLB-based version of ioremap()
will actually take the size into account.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
LoongArch: Refactor cache probe and flush methods2022-10-12T08:36:14ZHuacai Chenchenhuacai@loongson.cn2022-10-12T08:36:14Zurn:sha1:b61a40afca164a9bd066f749beff3bf209c5e209
Current cache probe and flush methods have some drawbacks:
1, Assume there are 3 cache levels and only 3 levels;
2, Assume L1 = I + D, L2 = V, L3 = S, V is exclusive, S is inclusive.
However, the fact is I + D, I + D + V, I + D + S and I + D + V + S are
all valid. So, refactor the cache probe and flush methods to adapt more
types of cache hierarchy.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
LoongArch: Add PCI controller support2022-08-12T05:10:11ZHuacai Chenchenhuacai@loongson.cn2022-08-06T07:19:33Zurn:sha1:57fc7323a8e7c2e7c1d5795ab63cb3ffea3cfdfb
Loongson64 based systems are PC-like systems which use PCI/PCIe as its
I/O bus, This patch adds the PCI host controller support for LoongArch.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
LoongArch: Add build infrastructure2022-06-03T12:09:27ZHuacai Chenchenhuacai@loongson.cn2022-05-31T10:04:11Zurn:sha1:fa96b57c149061f71a70bd6582d995f6424fbbf4
Add Kbuild, Makefile, Kconfig and link script for LoongArch build
infrastructure.
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>