/* SPDX-License-Identifier: GPL-2.0 */ /* * bbc.h: Defines for BootBus Controller found on UltraSPARC-III * systems. * * Copyright (C) 2000 David S. Miller (davem@redhat.com) */ #ifndef _SPARC64_BBC_H #define _SPARC64_BBC_H /* Register sizes are indicated by "B" (Byte, 1-byte), * "H" (Half-word, 2 bytes), "W" (Word, 4 bytes) or * "Q" (Quad, 8 bytes) inside brackets. */ #define BBC_AID 0x00 /* [B] Agent ID */ #define BBC_DEVP 0x01 /* [B] Device Present */ #define BBC_ARB 0x02 /* [B] Arbitration */ #define BBC_QUIESCE 0x03 /* [B] Quiesce */ #define BBC_WDACTION 0x04 /* [B] Watchdog Action */ #define BBC_SPG 0x06 /* [B] Soft POR Gen */ #define BBC_SXG 0x07 /* [B] Soft XIR Gen */ #define BBC_PSRC 0x08 /* [W] POR Source */ #define BBC_XSRC 0x0c /* [B] XIR Source */ #define BBC_CSC 0x0d /* [B] Clock Synthesizers Control*/ #define BBC_ES_CTRL 0x0e /* [H] Energy Star Control */ #define BBC_ES_ACT 0x10 /* [W] E* Assert Change Time */ #define BBC_ES_DACT 0x14 /* [B] E* De-Assert Change Time */ #define BBC_ES_DABT 0x15 /* [B] E* De-Assert Bypass Time */ #define BBC_ES_ABT 0x16 /* [H] E* Assert Bypass Time */ #define BBC_ES_PST 0x18 /* [W] E* PLL Settle Time */ #define BBC_ES_FSL 0x1c /* [W] E* Frequency Switch Latency*/ #define BBC_EBUST 0x20 /* [Q] EBUS Timing */ #define BBC_JTAG_CMD 0x28 /* [W] JTAG+ Command */ #define BBC_JTAG_CTRL 0x2c /* [B] JTAG+ Control */ #define BBC_I2C_SEL 0x2d /* [B] I2C Selection */ #define BBC_I2C_0_S1 0x2e /* [B] I2C ctrlr-0 reg S1 */ #define BBC_I2C_0_S0 0x2f /* [B] I2C ctrlr-0 regs S0,S0',S2,S3*/ #define BBC_I2C_1_S1 0x30 /* [B] I2C ctrlr-1 reg S1 */ #define BBC_I2C_1_S0 0x31 /* [B] I2C ctrlr-1 regs S0,S0',S2,S3*/ #define BBC_KBD_BEEP 0x32 /* [B] Keyboard Beep */ #define BBC_KBD_BCNT 0x34 /* [W] Keyboard Beep Counter */ #define BBC_REGS_SIZE 0x40 /* There is a 2K scratch ram area at offset 0x80000 but I doubt * we will use it for anything. */ /* Agent ID register. This register shows the Safari Agent ID * for the processors. The value returned depends upon which * cpu is reading the register. */ #define BBC_AID_ID 0x07 /* Safari ID */ #define BBC_AID_RESV 0xf8 /* Reserved */ /* Device Present register. One can determine which cpus are actually * present in the machine by interrogating this register. */ #define BBC_DEVP_CPU0 0x01 /* Processor 0 present */ #define BBC_DEVP_CPU1 0x02 /* Processor 1 present */ #define BBC_DEVP_CPU2 0x04 /* Processor 2 present */ #define BBC_DEVP_CPU3 0x08 /* Processor 3 present */ #define BBC_DEVP_RESV 0xf0 /* Reserved */ /* Arbitration register. This register is used to block access to * the BBC from a particular cpu. */ #define BBC_ARB_CPU0 0x01 /* Enable cpu 0 BBC arbitratrion */ #define BBC_ARB_CPU1 0x02 /* Enable cpu 1 BBC arbitratrion */ #define BBC_ARB_CPU2 0x04 /* Enable cpu 2 BBC arbitratrion */ #define BBC_ARB_CPU3 0x08 /* Enable cpu 3 BBC arbitratrion */ #define BBC_ARB_RESV 0xf0 /* Reserved */ /* Quiesce register. Bus and BBC segments for cpus can be disabled * with this register, ie. for hot plugging. */ #define BBC_QUIESCE_S02 0x01 /* Quiesce Safari segment for cpu 0 and 2 */ #define BBC_QUIESCE_S13 0x02 /* Quiesce Safari segment for cpu 1 and 3 */ #define BBC_QUIESCE_B02 0x04 /* Quiesce BBC segment for cpu 0 and 2 */ #define BBC_QUIESCE_B13 0x08 /* Quiesce BBC segment for cpu 1 and 3 */ #define BBC_QUIESCE_FD0 0x10 /* Disable Fatal_Error[0] reporting */ #define BBC_QUIESCE_FD1 0x20 /* Disable Fatal_Error[1] reporting */ #define BBC_QUIESCE_FD2 0x40 /* Disable Fatal_Error[2] reporting */ #define BBC_QUIESCE_FD3 0x80 /* Disable Fatal_Error[3] reporting */ /* Watchdog Action register. When the watchdog device timer expires * a line is enabled to the BBC. The action BBC takes when this line * is asserted can be controlled by this regiser. */ #define BBC_WDACTION_RST 0x01 /* When set, watchdog causes system reset. * When clear, BBC ignores watchdog signal. */ #define BBC_WDACTION_RESV 0xfe /* Reserved */ /* Soft_POR_GEN register. The POR (Power On Reset) signal may be asserted * for specific processors or all processors via this register. */ #define BBC_SPG_CPU0 0x01 /* Assert POR for processor 0 */ #define BBC_SPG_CPU1 0x02 /* Assert POR for processor 1 */ #define BBC_SPG_CPU2 0x04 /* Assert POR for processor 2 */ #define BBC_SPG_CPU3 0x08 /* Assert POR for processor 3 */ #define BBC_SPG_CPUALL 0x10 /* Reset all processors and reset * the entire system. */ #define BBC_SPG_RESV 0xe0 /* Reserved */ /* Soft_XIR_GEN register. The XIR (eXternally Initiated Reset) signal * may be asserted to specific processors via this register. */ #define BBC_SXG_CPU0 0x01 /* Assert XIR for processor 0 */ #define BBC_SXG_CPU1 0x02 /* Assert XIR for processor 1 */ #define BBC_SXG_CPU2 0x04 /* Assert XIR for processor 2 */ #define BBC_SXG_CPU3 0x08 /* Assert XIR for processor 3 */ #define BBC_SXG_RESV 0xf0 /* Reserved */ /* POR Source register. One may identify the cause of the most recent * reset by reading this register. */ #define BBC_PSRC_SPG0 0x0001 /* CPU 0 reset via BBC_SPG register */ #define BBC_PSRC_SPG1 0x0002 /* CPU 1 reset via BBC_SPG register */ #define BBC_PSRC_SPG2 0x0004 /* CPU 2 reset via BBC_SPG register */ #define BBC_PSRC_SPG3 0x0008 /* CPU 3 reset via BBC_SPG register */ #define BBC_PSRC_SPGSYS 0x0010 /* System reset via BBC_SPG register */ #define BBC_PSRC_JTAG 0x0020 /* System reset via JTAG+ */ #define BBC_PSRC_BUTTON 0x0040 /* System reset via push-button dongle */ #define BBC_PSRC_PWRUP 0x0080 /* System reset via power-up */ #define BBC_PSRC_FE0 0x0100 /* CPU 0 reported Fatal_Error */ #define BBC_PSRC_FE1 0x0200 /* CPU 1 reported Fatal_Error */ #define BBC_PSRC_FE2 0x0400 /* CPU 2 reported Fatal_Error */ #define BBC_PSRC_FE3 0x0800 /* CPU 3 reported Fatal_Error */ #define BBC_PSRC_FE4 0x1000 /* Schizo reported Fatal_Error */ #define BBC_PSRC_FE5 0x2000 /* Safari device 5 reported Fatal_Error */ #define BBC_PSRC_FE6 0x4000 /* CPMS reported Fatal_Error */ #define BBC_PSRC_SYNTH 0x8000 /* System reset when on-board clock synthesizers * were updated. */ #define BBC_PSRC_WDT 0x10000 /* System reset via Super I/O watchdog */ #define BBC_PSRC_RSC 0x20000 /* System reset via RSC remote monitoring * device */ /* XIR Source register. The source of an XIR event sent to a processor may * be determined via this register. */ #define BBC_XSRC_SXG0 0x01 /* CPU 0 received XIR via Soft_XIR_GEN reg */ #define BBC_XSRC_SXG1 0x02 /* CPU 1 received XIR via Soft_XIR_GEN reg */ #define BBC_XSRC_SXG2 0x04 /* CPU 2 received XIR via Soft_XIR_GEN reg */ #define BBC_XSRC_SXG3 0x08 /* CPU 3 received XIR via Soft_XIR_GEN reg */ #define BBC_XSRC_JTAG 0x10 /* All CPUs received XIR via JTAG+ */ #define BBC_XSRC_W_OR_B 0x20 /* All CPUs received XIR either because: * a) Super I/O watchdog fired, or * b) XIR push button was activated */ #define BBC_XSRC_RESV 0xc0 /* Reserved */ /* Clock Synthesizers Control register. This register provides the big-bang * programming interface to the two clock synthesizers of the machine. */ #define BBC_CSC_SLOAD 0x01 /* Directly connected to S_LOAD pins */ #define BBC_CSC_SDATA 0x02 /* Directly connected to S_DATA pins */ #define BBC_CSC_SCLOCK 0x04 /* Directly connected to S_CLOCK pins */ #define BBC_CSC_RESV 0x78 /* Reserved */ #define BBC_CSC_RST 0x80 /* Generate system reset when S_LOAD==1 */ /* Energy Star Control register. This register is used to generate the * clock frequency change trigger to the main system devices (Schizo and * the processors). The transition occurs when bits in this register * go from 0 to 1, only one bit must be set at once else no action * occurs. Basically the sequence of events is: * a) Choose new frequency: full, 1/2 or 1/32 * b) Program this desired frequency into the cpus and Schizo. * c) Set the same value in this register. * d) 16 system clocks later, clear this register. */ #define BBC_ES_CTRL_1_1 0x01 /* Full frequency */ #define BBC_ES_CTRL_1_2 0x02 /* 1/2 frequency */ #define BBC_ES_CTRL_1_32 0x20 /* 1/32 frequency */ #define BBC_ES_RESV 0xdc /* Reserved */ /* Energy Star Assert Change Time register. This determines the number * of BBC clock cycles (which is half the system frequency) between * the detection of FREEZE_ACK being asserted and the assertion of * the CLK_CHANGE_L[2:0] signals. */ #define BBC_ES_ACT_VAL 0xff /* Energy Star Assert Bypass Time register. This determines the number * of BBC clock cycles (which is half the system frequency) between * the assertion of the CLK_CHANGE_L[2:0] signals and the assertion of * the ESTAR_PLL_BYPASS signal. */ #define BBC_ES_ABT_VAL 0xffff /* Energy Star PLL Settle Time register. This determines the number of * BBC clock cycles (which is half the system frequency) between the * de-assertion of CLK_CHANGE_L[2:0] and the de-assertion of the FREEZE_L * signal. */ #define BBC_ES_PST_VAL 0xffffffff /* Energy Star Frequency Switch Latency register. This is the number of * BBC clocks between the de-assertion of CLK_CHANGE_L[2:0] and the first * edge of the Safari clock at the new frequency. */ #define BBC_ES_FSL_VAL 0xffffffff /* Keyboard Beep control register. This is a simple enabler for the audio * beep sound. */ #define BBC_KBD_BEEP_ENABLE 0x01 /* Enable beep */ #define BBC_KBD_BEEP_RESV 0xfe /* Reserved */ /* Keyboard Beep Counter register. There is a free-running counter inside * the BBC which runs at half the system clock. The bit set in this register * determines when the audio sound is generated. So for example if bit * 10 is set, the audio beep will oscillate at 1/(2**12). The keyboard beep * generator automatically selects a different bit to use if the system clock * is changed via Energy Star. */ #define BBC_KBD_BCNT_BITS 0x0007fc00 #define BBC_KBC_BCNT_RESV 0xfff803ff #endif /* _SPARC64_BBC_H */