diff options
| author |   Wu Zhangjin <wuzhangjin@gmail.com> | 2009-07-02 23:23:30 +0800 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2009-09-17 20:07:46 +0200 |
| commit | f7face03c66cea12159191ba8d2a9ee735da0b0d (patch) | |
| tree | 88de3a5f53b09946a2500efb578417659ddb5e42 /arch/mips/lemote/lm2e/pci.c | |
| parent | MIPS: Loongson: clean up the coding style (diff) | |
| download | linux-dev-f7face03c66cea12159191ba8d2a9ee735da0b0d.tar.xz linux-dev-f7face03c66cea12159191ba8d2a9ee735da0b0d.zip | |
MIPS: Loongson: PCI: Clean up pcimap setup
Fixup the wrong original comment of pcimap, and make the source code more
understandable. and also, some new extra consideration is added in.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/mips/lemote/lm2e/pci.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/arch/mips/lemote/lm2e/pci.c b/arch/mips/lemote/lm2e/pci.c index bee846e6d8a8..9812c30cc6eb 100644 --- a/arch/mips/lemote/lm2e/pci.c +++ b/arch/mips/lemote/lm2e/pci.c @@ -34,33 +34,44 @@ static struct pci_controller loongson2e_pci_controller = { .io_offset = 0x00000000UL, }; -static void __init ict_pcimap(void) +static void __init setup_pcimap(void) { /* - * local to PCI mapping: [256M,512M] -> [256M,512M]; differ from PMON - * + * local to PCI mapping for CPU accessing PCI space * CPU address space [256M,448M] is window for accessing pci space - * we set pcimap_lo[0,1,2] to map it to pci space [256M,448M] - * pcimap: bit18,pcimap_2; bit[17-12],lo2;bit[11-6],lo1;bit[5-0],lo0 + * we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M] + * + * pcimap: PCI_MAP2 PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0 + * [<2G] [384M,448M] [320M,384M] [0M,64M] */ - /* 1,00 0110 ,0001 01,00 0000 */ - BONITO_PCIMAP = 0x46140; - - /* 1, 00 0010, 0000,01, 00 0000 */ - /* BONITO_PCIMAP = 0x42040; */ + BONITO_PCIMAP = BONITO_PCIMAP_PCIMAP_2 | + BONITO_PCIMAP_WIN(2, BONITO_PCILO2_BASE) | + BONITO_PCIMAP_WIN(1, BONITO_PCILO1_BASE) | + BONITO_PCIMAP_WIN(0, 0); /* - * PCI to local mapping: [2G,2G+256M] -> [0,256M] + * PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M] */ - BONITO_PCIBASE0 = 0x80000000; - BONITO_PCIBASE1 = 0x00800000; - BONITO_PCIBASE2 = 0x90000000; + BONITO_PCIBASE0 = 0x80000000ul; /* base: 2G -> mmap: 0M */ + /* size: 256M, burst transmission, pre-fetch enable, 64bit */ + LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul; + LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful; + LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */ + LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul; + LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */ + LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul; + + /* avoid deadlock of PCI reading/writing lock operation */ + LOONGSON_PCI_ISR4C = 0xd2000001ul; + /* can not change gnt to break pci transfer when device's gnt not + deassert for some broken device */ + LOONGSON_PXARB_CFG = 0x00fe0105ul; } static int __init pcibios_init(void) { - ict_pcimap(); + setup_pcimap(); loongson2e_pci_controller.io_map_base = mips_io_port_base; |