diff options
Diffstat (limited to 'arch/powerpc/boot')
| -rw-r--r-- | arch/powerpc/boot/44x.c | 29 | ||||
| -rw-r--r-- | arch/powerpc/boot/44x.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/boot/dcr.h | 37 | ||||
| -rw-r--r-- | arch/powerpc/boot/dts/ebony.dts | 8 | ||||
| -rw-r--r-- | arch/powerpc/boot/ebony.c | 1 |
5 files changed, 71 insertions, 5 deletions
diff --git a/arch/powerpc/boot/44x.c b/arch/powerpc/boot/44x.c index bc3f570ff9b..9f64e840bef 100644 --- a/arch/powerpc/boot/44x.c +++ b/arch/powerpc/boot/44x.c @@ -54,3 +54,32 @@ void ibm44x_dbcr_reset(void) ); } + +/* Read 4xx EBC bus bridge registers to get mappings of the peripheral + * banks into the OPB address space */ +void ibm4xx_fixup_ebc_ranges(const char *ebc) +{ + void *devp; + u32 bxcr; + u32 ranges[EBC_NUM_BANKS*4]; + u32 *p = ranges; + int i; + + for (i = 0; i < EBC_NUM_BANKS; i++) { + mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i)); + bxcr = mfdcr(DCRN_EBC0_CFGDATA); + + if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) { + *p++ = i; + *p++ = 0; + *p++ = bxcr & EBC_BXCR_BAS; + *p++ = EBC_BXCR_BANK_SIZE(bxcr); + } + } + + devp = finddevice(ebc); + if (! devp) + fatal("Couldn't locate EBC node %s\n\r", ebc); + + setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32)); +} diff --git a/arch/powerpc/boot/44x.h b/arch/powerpc/boot/44x.h index 0da4abf390a..577982c9a3c 100644 --- a/arch/powerpc/boot/44x.h +++ b/arch/powerpc/boot/44x.h @@ -11,6 +11,7 @@ #define _PPC_BOOT_44X_H_ void ibm44x_fixup_memsize(void); +void ibm4xx_fixup_ebc_ranges(const char *ebc); void ibm44x_dbcr_reset(void); void ebony_init(void *mac0, void *mac1); diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h index 877bc97b1e9..14b44aa96fe 100644 --- a/arch/powerpc/boot/dcr.h +++ b/arch/powerpc/boot/dcr.h @@ -26,6 +26,43 @@ static const unsigned long sdram_bxcr[] = { SDRAM0_B0CR, SDRAM0_B1CR, SDRAM0_B2C #define SDRAM_CONFIG_BANK_SIZE(reg) \ (0x00400000 << ((reg & SDRAM_CONFIG_SIZE_MASK) >> 17)) +/* 440GP External Bus Controller (EBC) */ +#define DCRN_EBC0_CFGADDR 0x012 +#define DCRN_EBC0_CFGDATA 0x013 +#define EBC_NUM_BANKS 8 +#define EBC_B0CR 0x00 +#define EBC_B1CR 0x01 +#define EBC_B2CR 0x02 +#define EBC_B3CR 0x03 +#define EBC_B4CR 0x04 +#define EBC_B5CR 0x05 +#define EBC_B6CR 0x06 +#define EBC_B7CR 0x07 +#define EBC_BXCR(n) (n) +#define EBC_BXCR_BAS 0xfff00000 +#define EBC_BXCR_BS 0x000e0000 +#define EBC_BXCR_BANK_SIZE(reg) \ + (0x100000 << (((reg) & EBC_BXCR_BS) >> 17)) +#define EBC_BXCR_BU 0x00018000 +#define EBC_BXCR_BU_OFF 0x00000000 +#define EBC_BXCR_BU_RO 0x00008000 +#define EBC_BXCR_BU_WO 0x00010000 +#define EBC_BXCR_BU_RW 0x00018000 +#define EBC_BXCR_BW 0x00006000 +#define EBC_B0AP 0x10 +#define EBC_B1AP 0x11 +#define EBC_B2AP 0x12 +#define EBC_B3AP 0x13 +#define EBC_B4AP 0x14 +#define EBC_B5AP 0x15 +#define EBC_B6AP 0x16 +#define EBC_B7AP 0x17 +#define EBC_BXAP(n) (0x10+(n)) +#define EBC_BEAR 0x20 +#define EBC_BESR 0x21 +#define EBC_CFG 0x23 +#define EBC_CID 0x24 + /* 440GP Clock, PM, chip control */ #define DCRN_CPC0_SR 0x0b0 #define DCRN_CPC0_ER 0x0b1 diff --git a/arch/powerpc/boot/dts/ebony.dts b/arch/powerpc/boot/dts/ebony.dts index 0ec02f4726b..586a2fc13c6 100644 --- a/arch/powerpc/boot/dts/ebony.dts +++ b/arch/powerpc/boot/dts/ebony.dts @@ -135,11 +135,9 @@ #address-cells = <2>; #size-cells = <1>; clock-frequency = <0>; // Filled in by zImage - ranges = <0 00000000 fff00000 100000 - 1 00000000 48000000 100000 - 2 00000000 ff800000 400000 - 3 00000000 48200000 100000 - 7 00000000 48300000 100000>; + // ranges property is supplied by zImage + // based on firmware's configuration of the + // EBC bridge interrupts = <5 4>; interrupt-parent = <&UIC1>; diff --git a/arch/powerpc/boot/ebony.c b/arch/powerpc/boot/ebony.c index 63498580200..75daedafd0a 100644 --- a/arch/powerpc/boot/ebony.c +++ b/arch/powerpc/boot/ebony.c @@ -100,6 +100,7 @@ static void ebony_fixups(void) ibm440gp_fixup_clocks(sysclk, 6 * 1843200); ibm44x_fixup_memsize(); dt_fixup_mac_addresses(ebony_mac0, ebony_mac1); + ibm4xx_fixup_ebc_ranges("/plb/opb/ebc"); } void ebony_init(void *mac0, void *mac1) |