uninorth.h
上传用户:jlfgdled
上传日期:2013-04-10
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- /*
- * BK Id: SCCS/s.uninorth.h 1.13 10/23/01 08:09:35 trini
- */
- /*
- * uninorth.h: definitions for using the "UniNorth" host bridge chip
- * from Apple. This chip is used on "Core99" machines
- *
- */
- #ifdef __KERNEL__
- #ifndef __ASM_UNINORTH_H__
- #define __ASM_UNINORTH_H__
- /*
- * Uni-N config space reg. definitions
- *
- * (Little endian)
- */
- /* Address ranges selection. This one should work with Bandit too */
- #define UNI_N_ADDR_SELECT 0x48
- #define UNI_N_ADDR_COARSE_MASK 0xffff0000 /* 256Mb regions at *0000000 */
- #define UNI_N_ADDR_FINE_MASK 0x0000ffff /* 16Mb regions at f*000000 */
- /* AGP registers */
- #define UNI_N_CFG_GART_BASE 0x8c
- #define UNI_N_CFG_AGP_BASE 0x90
- #define UNI_N_CFG_GART_CTRL 0x94
- #define UNI_N_CFG_INTERNAL_STATUS 0x98
- /* UNI_N_CFG_GART_CTRL bits definitions */
- #define UNI_N_CFG_GART_INVAL 0x00000001
- #define UNI_N_CFG_GART_ENABLE 0x00000100
- #define UNI_N_CFG_GART_2xRESET 0x00010000
- /* My understanding of UniNorth AGP as of UniNorth rev 1.0x,
- * revision 1.5 (x4 AGP) may need further changes.
- *
- * AGP_BASE register contains the base address of the AGP aperture on
- * the AGP bus. It doesn't seem to be visible to the CPU as of UniNorth 1.x,
- * even if decoding of this address range is enabled in the address select
- * register. Apparently, the only supported bases are 256Mb multiples
- * (high 4 bits of that register).
- *
- * GART_BASE register appear to contain the physical address of the GART
- * in system memory in the high address bits (page aligned), and the
- * GART size in the low order bits (number of GART pages)
- *
- * The GART format itself is one 32bits word per physical memory page.
- * This word contains, in little-endian format (!!!), the physical address
- * of the page in the high bits, and what appears to be an "enable" bit
- * in the LSB bit (0) that must be set to 1 when the entry is valid.
- *
- * Obviously, the GART is not cache coherent and so any change to it
- * must be flushed to memory (or maybe just make the GART space non
- * cachable). AGP memory itself doens't seem to be cache coherent neither.
- *
- * In order to invalidate the GART (which is probably necessary to inval
- * the bridge internal TLBs), the following sequence has to be written,
- * in order, to the GART_CTRL register:
- *
- * UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL
- * UNI_N_CFG_GART_ENABLE
- * UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_2xRESET
- * UNI_N_CFG_GART_ENABLE
- *
- * As far as AGP "features" are concerned, it looks like fast write may
- * not be supported but this has to be confirmed.
- *
- * Turning on AGP seem to require a double invalidate operation, one before
- * setting the AGP command register, on after.
- *
- * Turning off AGP seems to require the following sequence: first wait
- * for the AGP to be idle by reading the internal status register, then
- * write in that order to the GART_CTRL register:
- *
- * UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL
- * 0
- * UNI_N_CFG_GART_2xRESET
- * 0
- */
- /*
- * Uni-N memory mapped reg. definitions
- *
- * Those registers are Big-Endian !!
- *
- * Their meaning come from either Darwin and/or from experiments I made with
- * the bootrom, I'm not sure about their exact meaning yet
- *
- */
- /* Version of the UniNorth chip */
- #define UNI_N_VERSION 0x0000 /* Known versions: 3,7 and 8 */
-
- /* This register is used to enable/disable various clocks */
- #define UNI_N_CLOCK_CNTL 0x0020
- #define UNI_N_CLOCK_CNTL_PCI 0x00000001 /* PCI2 clock control */
- #define UNI_N_CLOCK_CNTL_GMAC 0x00000002 /* GMAC clock control */
- #define UNI_N_CLOCK_CNTL_FW 0x00000004 /* FireWire clock control */
- /* Power Management control */
- #define UNI_N_POWER_MGT 0x0030
- #define UNI_N_POWER_MGT_NORMAL 0x00
- #define UNI_N_POWER_MGT_IDLE2 0x01
- #define UNI_N_POWER_MGT_SLEEP 0x02
- /* This register is configured by Darwin depending on the UniN
- * revision
- */
- #define UNI_N_ARB_CTRL 0x0040
- #define UNI_N_ARB_CTRL_QACK_DELAY_SHIFT 15
- #define UNI_N_ARB_CTRL_QACK_DELAY_MASK 0x0e1f8000
- #define UNI_N_ARB_CTRL_QACK_DELAY 0x30
- #define UNI_N_ARB_CTRL_QACK_DELAY105 0x00
- /* This one _might_ return the CPU number of the CPU reading it;
- * the bootROM decides wether to boot or to sleep/spinloop depending
- * on this register beeing 0 or not
- */
- #define UNI_N_CPU_NUMBER 0x0050
- /* This register appear to be read by the bootROM to decide what
- * to do on a non-recoverable reset (powerup or wakeup)
- */
- #define UNI_N_HWINIT_STATE 0x0070
- #define UNI_N_HWINIT_STATE_SLEEPING 0x01
- #define UNI_N_HWINIT_STATE_RUNNING 0x02
- /* This last bit appear to be used by the bootROM to know the second
- * CPU has started and will enter it's sleep loop with IP=0
- */
- #define UNI_N_HWINIT_STATE_CPU1_FLAG 0x10000000
- /* Uninorth 1.5 rev. has additional perf. monitor registers at 0xf00-0xf50 */
- #endif /* __ASM_UNINORTH_H__ */
- #endif /* __KERNEL__ */