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3 Commits

Author SHA1 Message Date
Max Filippov
0c401fdf27 xtensa: virt: fix PCI IO ports mapping 
virt device tree incorrectly uses 0xf0000000 on both sides of PCI IO
ports address space mapping. This results in incorrect port address
assignment in PCI IO BARs and subsequent crash on attempt to access
them. Use 0 as base address in PCI IO ports address space.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2019-10-15 14:29:53 -07:00
Max Filippov
982792f458 xtensa: virt: move PCI root complex to KIO range 
Move PCI configuration space, MMIO and memory to the KIO range to free
vmalloc area and use static TLB to access them. Move MMIO to the
beginning of KIO and define PCI_IOBASE as XCHAL_KIO_BYPASS_VADDR to
match it. Reduce number of supported PCI buses to 0x3f so that ECAM
window fits into first 64MB of the KIO. Reduce size of the PCI memory
window to 128MB so that it fits into KIO.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2019-09-02 00:09:30 -07:00
Max Filippov
775f1f7eac xtensa: virt: add defconfig and DTS 
Add defconfig and DTS for a virt board. Defconfig enables PCIe host and
a number of virtio devices. DTS routes legacy PCI IRQs to the first four
level-triggered external IRQ lines. CPU core with edge-triggered IRQs
among the first four may need a custom DTS to work correctly.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2019-07-08 14:32:06 -07:00