When QEMU originally supported the ppce500 machine back in Jan 2014, it was created with a 1:1 mapping of PCI bus address. Things seemed to change rapidly that in Nov 2014 with the following QEMU commits:
commit e6b4e5f4795b ("PPC: e500: Move CCSR and MMIO space to upper end of address space")
and
commit cb3778a0455a ("PPC: e500 pci host: Add support for ATMUs")
the PCI memory and IO physical address were moved to beyond 4 GiB, but PCI bus address remained below 4 GiB, hence a non-identity mapping was created. Unfortunately corresponding U-Boot updates were missed along with the QEMU changes and the U-Boot QEMU ppce500 PCI support has been broken since then.
This commit makes the PCI (non-DM version) work again.
Signed-off-by: Bin Meng bmeng.cn@gmail.com ---
board/freescale/qemu-ppce500/qemu-ppce500.c | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-)
diff --git a/board/freescale/qemu-ppce500/qemu-ppce500.c b/board/freescale/qemu-ppce500/qemu-ppce500.c index 3395377..f82501c 100644 --- a/board/freescale/qemu-ppce500/qemu-ppce500.c +++ b/board/freescale/qemu-ppce500/qemu-ppce500.c @@ -84,20 +84,24 @@ int checkboard(void) }
static int pci_map_region(void *fdt, int pci_node, int range_id, - phys_size_t *ppaddr, pci_addr_t *pvaddr, - pci_size_t *psize, ulong *pmap_addr) + phys_addr_t *pbaddr, phys_size_t *ppaddr, + pci_addr_t *pvaddr, pci_size_t *psize, + ulong *pmap_addr) { - uint64_t addr; + uint64_t baddr; + uint64_t paddr; uint64_t size; ulong map_addr; int r;
- r = fdt_read_range(fdt, pci_node, range_id, NULL, &addr, &size); + r = fdt_read_range(fdt, pci_node, range_id, &baddr, &paddr, &size); if (r) return r;
+ if (pbaddr) + *pbaddr = baddr; if (ppaddr) - *ppaddr = addr; + *ppaddr = paddr; if (psize) *psize = size;
@@ -114,7 +118,7 @@ static int pci_map_region(void *fdt, int pci_node, int range_id, return -1;
/* Map virtual memory for range */ - assert(!tlb_map_range(map_addr, addr, size, TLB_MAP_IO)); + assert(!tlb_map_range(map_addr, paddr, size, TLB_MAP_IO)); *pmap_addr = map_addr + size;
if (pvaddr) @@ -165,24 +169,19 @@ void pci_init_board(void) pci_info.regs = fdt_translate_address(fdt, pci_node, reg);
/* Map MMIO range */ - r = pci_map_region(fdt, pci_node, 0, &pci_info.mem_phys, NULL, + r = pci_map_region(fdt, pci_node, 0, &pci_info.mem_bus, + &pci_info.mem_phys, NULL, &pci_info.mem_size, &map_addr); if (r) break;
/* Map PIO range */ - r = pci_map_region(fdt, pci_node, 1, &pci_info.io_phys, NULL, + r = pci_map_region(fdt, pci_node, 1, &pci_info.io_bus, + &pci_info.io_phys, NULL, &pci_info.io_size, &map_addr); if (r) break;
- /* - * The PCI framework finds virtual addresses for the buses - * through our address map, so tell it the physical addresses. - */ - pci_info.mem_bus = pci_info.mem_phys; - pci_info.io_bus = pci_info.io_phys; - /* Instantiate */ pci_info.pci_num = pci_num + 1;