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uninorth.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * uninorth.h: definitions for using the "UniNorth" host bridge chip * from Apple. This chip is used on "Core99" machines * This also includes U2 used on more recent MacRISC2/3 * machines and U3 (G5) * */ #ifdef __KERNEL__ #ifndef __ASM_UNINORTH_H__ #define __ASM_UNINORTH_H__ /* * Uni-N and U3 config space reg. definitions * * (Little endian) */ /* Address ranges selection. This one should work with Bandit too */ /* Not U3 */ #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 */ /* Not U3 */ #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 #define UNI_N_CFG_GART_DUMMY_PAGE 0xa4 /* 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 #define UNI_N_CFG_GART_DISSBADET 0x00020000 /* The following seems to only be used only on U3 <j.glisse@gmail.com> */ #define U3_N_CFG_GART_SYNCMODE 0x00040000 #define U3_N_CFG_GART_PERFRD 0x00080000 #define U3_N_CFG_GART_B2BGNT 0x00200000 #define U3_N_CFG_GART_FASTDDR 0x00400000 /* 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 doesn'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 */ #define UNI_N_VERSION_107 0x0003 /* 1.0.7 */ #define UNI_N_VERSION_10A 0x0007 /* 1.0.10 */ #define UNI_N_VERSION_150 0x0011 /* 1.5 */ #define UNI_N_VERSION_200 0x0024 /* 2.0 */ #define UNI_N_VERSION_PANGEA 0x00C0 /* Integrated U1 + K */ #define UNI_N_VERSION_INTREPID 0x00D2 /* Integrated U2 + K */ #define UNI_N_VERSION_300 0x0030 /* 3.0 (U3 on G5) */ /* 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 */ #define UNI_N_CLOCK_CNTL_ATA100 0x00000010 /* ATA-100 clock control (U2) */ /* 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 whether to boot or to sleep/spinloop depending * on this register being 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 /* This register controls AACK delay, which is set when 2004 iBook/PowerBook * is in low speed mode. */ #define UNI_N_AACK_DELAY 0x0100 #define UNI_N_AACK_DELAY_ENABLE 0x00000001 /* Clock status for Intrepid */ #define UNI_N_CLOCK_STOP_STATUS0 0x0150 #define UNI_N_CLOCK_STOPPED_EXTAGP 0x00200000 #define UNI_N_CLOCK_STOPPED_AGPDEL 0x00100000 #define UNI_N_CLOCK_STOPPED_I2S0_45_49 0x00080000 #define UNI_N_CLOCK_STOPPED_I2S0_18 0x00040000 #define UNI_N_CLOCK_STOPPED_I2S1_45_49 0x00020000 #define UNI_N_CLOCK_STOPPED_I2S1_18 0x00010000 #define UNI_N_CLOCK_STOPPED_TIMER 0x00008000 #define UNI_N_CLOCK_STOPPED_SCC_RTCLK18 0x00004000 #define UNI_N_CLOCK_STOPPED_SCC_RTCLK32 0x00002000 #define UNI_N_CLOCK_STOPPED_SCC_VIA32 0x00001000 #define UNI_N_CLOCK_STOPPED_SCC_SLOT0 0x00000800 #define UNI_N_CLOCK_STOPPED_SCC_SLOT1 0x00000400 #define UNI_N_CLOCK_STOPPED_SCC_SLOT2 0x00000200 #define UNI_N_CLOCK_STOPPED_PCI_FBCLKO 0x00000100 #define UNI_N_CLOCK_STOPPED_VEO0 0x00000080 #define UNI_N_CLOCK_STOPPED_VEO1 0x00000040 #define UNI_N_CLOCK_STOPPED_USB0 0x00000020 #define UNI_N_CLOCK_STOPPED_USB1 0x00000010 #define UNI_N_CLOCK_STOPPED_USB2 0x00000008 #define UNI_N_CLOCK_STOPPED_32 0x00000004 #define UNI_N_CLOCK_STOPPED_45 0x00000002 #define UNI_N_CLOCK_STOPPED_49 0x00000001 #define UNI_N_CLOCK_STOP_STATUS1 0x0160 #define UNI_N_CLOCK_STOPPED_PLL4REF 0x00080000 #define UNI_N_CLOCK_STOPPED_CPUDEL 0x00040000 #define UNI_N_CLOCK_STOPPED_CPU 0x00020000 #define UNI_N_CLOCK_STOPPED_BUF_REFCKO 0x00010000 #define UNI_N_CLOCK_STOPPED_PCI2 0x00008000 #define UNI_N_CLOCK_STOPPED_FW 0x00004000 #define UNI_N_CLOCK_STOPPED_GB 0x00002000 #define UNI_N_CLOCK_STOPPED_ATA66 0x00001000 #define UNI_N_CLOCK_STOPPED_ATA100 0x00000800 #define UNI_N_CLOCK_STOPPED_MAX 0x00000400 #define UNI_N_CLOCK_STOPPED_PCI1 0x00000200 #define UNI_N_CLOCK_STOPPED_KLPCI 0x00000100 #define UNI_N_CLOCK_STOPPED_USB0PCI 0x00000080 #define UNI_N_CLOCK_STOPPED_USB1PCI 0x00000040 #define UNI_N_CLOCK_STOPPED_USB2PCI 0x00000020 #define UNI_N_CLOCK_STOPPED_7PCI1 0x00000008 #define UNI_N_CLOCK_STOPPED_AGP 0x00000004 #define UNI_N_CLOCK_STOPPED_PCI0 0x00000002 #define UNI_N_CLOCK_STOPPED_18 0x00000001 /* Intrepid registe to OF do-platform-clockspreading */ #define UNI_N_CLOCK_SPREADING 0x190 /* Uninorth 1.5 rev. has additional perf. monitor registers at 0xf00-0xf50 */ /* * U3 specific registers */ /* U3 Toggle */ #define U3_TOGGLE_REG 0x00e0 #define U3_PMC_START_STOP 0x0001 #define U3_MPIC_RESET 0x0002 #define U3_MPIC_OUTPUT_ENABLE 0x0004 /* U3 API PHY Config 1 */ #define U3_API_PHY_CONFIG_1 0x23030 /* U3 HyperTransport registers */ #define U3_HT_CONFIG_BASE 0x70000 #define U3_HT_LINK_COMMAND 0x100 #define U3_HT_LINK_CONFIG 0x110 #define U3_HT_LINK_FREQ 0x120 #endif /* __ASM_UNINORTH_H__ */ #endif /* __KERNEL__ */
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