未验证 提交 7505576d 编写于 作者: T Thomas Bogendoerfer 提交者: Paul Burton

MIPS: add support for SGI Octane (IP30)

This changeset adds support for SGI Octane/Octane2 workstations.
Signed-off-by: NThomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: NPaul Burton <paulburton@kernel.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
上级 b9e9defb
......@@ -31,6 +31,7 @@ platforms += ralink
platforms += rb532
platforms += sgi-ip22
platforms += sgi-ip27
platforms += sgi-ip30
platforms += sgi-ip32
platforms += sibyte
platforms += sni
......
......@@ -755,6 +755,33 @@ config SGI_IP28
This is the SGI Indigo2 with R10000 processor. To compile a Linux
kernel that runs on these, say Y here.
config SGI_IP30
bool "SGI IP30 (Octane/Octane2)"
select ARCH_HAS_PHYS_TO_DMA
select FW_ARC
select FW_ARC64
select BOOT_ELF64
select CEVT_R4K
select CSRC_R4K
select SYNC_R4K if SMP
select ZONE_DMA32
select HAVE_PCI
select IRQ_MIPS_CPU
select IRQ_DOMAIN_HIERARCHY
select NR_CPUS_DEFAULT_2
select PCI_DRIVERS_GENERIC
select PCI_XTALK_BRIDGE
select SYS_HAS_EARLY_PRINTK
select SYS_HAS_CPU_R10000
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_SMP
select MIPS_L1_CACHE_SHIFT_7
select ARC_MEMORY
help
These are the SGI Octane and Octane2 graphics workstations. To
compile a Linux kernel that runs on these, say Y here.
config SGI_IP32
bool "SGI IP32 (O2)"
select ARC_MEMORY
......
/* SPDX-License-Identifier: GPL-2.0 */
/*
* IP30/Octane cpu-features overrides.
*
* Copyright (C) 2003 Ralf Baechle <ralf@linux-mips.org>
* 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* 2009 Johannes Dickgreber <tanzy@gmx.de>
* 2015 Joshua Kinard <kumba@gentoo.org>
*
*/
#ifndef __ASM_MACH_IP30_CPU_FEATURE_OVERRIDES_H
#define __ASM_MACH_IP30_CPU_FEATURE_OVERRIDES_H
#include <asm/cpu.h>
/*
* IP30 only supports R1[024]000 processors, all using the same config
*/
#define cpu_has_tlb 1
#define cpu_has_tlbinv 0
#define cpu_has_segments 0
#define cpu_has_eva 0
#define cpu_has_htw 0
#define cpu_has_rixiex 0
#define cpu_has_maar 0
#define cpu_has_rw_llb 0
#define cpu_has_3kex 0
#define cpu_has_4kex 1
#define cpu_has_3k_cache 0
#define cpu_has_4k_cache 1
#define cpu_has_6k_cache 0
#define cpu_has_8k_cache 0
#define cpu_has_tx39_cache 0
#define cpu_has_fpu 1
#define cpu_has_nofpuex 0
#define cpu_has_32fpr 1
#define cpu_has_counter 1
#define cpu_has_watch 1
#define cpu_has_64bits 1
#define cpu_has_divec 0
#define cpu_has_vce 0
#define cpu_has_cache_cdex_p 0
#define cpu_has_cache_cdex_s 0
#define cpu_has_prefetch 1
#define cpu_has_mcheck 0
#define cpu_has_ejtag 0
#define cpu_has_llsc 1
#define cpu_has_mips16 0
#define cpu_has_mdmx 0
#define cpu_has_mips3d 0
#define cpu_has_smartmips 0
#define cpu_has_rixi 0
#define cpu_has_xpa 0
#define cpu_has_vtag_icache 0
#define cpu_has_dc_aliases 0
#define cpu_has_ic_fills_f_dc 0
#define cpu_icache_snoops_remote_store 1
#define cpu_has_mips32r1 0
#define cpu_has_mips32r2 0
#define cpu_has_mips64r1 0
#define cpu_has_mips64r2 0
#define cpu_has_mips32r6 0
#define cpu_has_mips64r6 0
#define cpu_has_dsp 0
#define cpu_has_dsp2 0
#define cpu_has_mipsmt 0
#define cpu_has_userlocal 0
#define cpu_has_inclusive_pcaches 1
#define cpu_hwrena_impl_bits 0
#define cpu_has_perf_cntr_intr_bit 0
#define cpu_has_vz 0
#define cpu_has_fre 0
#define cpu_has_cdmm 0
#define cpu_dcache_line_size() 32
#define cpu_icache_line_size() 64
#define cpu_scache_line_size() 128
#endif /* __ASM_MACH_IP30_CPU_FEATURE_OVERRIDES_H */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* HEART IRQ defines
*
* Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de>
* 2014-2016 Joshua Kinard <kumba@gentoo.org>
*
*/
#ifndef __ASM_MACH_IP30_IRQ_H
#define __ASM_MACH_IP30_IRQ_H
/*
* HEART has 64 hardware interrupts, but use 128 to leave room for a few
* software interrupts as well (such as the CPU timer interrupt.
*/
#define NR_IRQS 128
extern void __init ip30_install_ipi(void);
/*
* HEART has 64 interrupt vectors available to it, subdivided into five
* priority levels. They are numbered 0 to 63.
*/
#define HEART_NUM_IRQS 64
/*
* These are the five interrupt priority levels and their corresponding
* CPU IPx interrupt pins.
*
* Level 4 - Error Interrupts.
* Level 3 - HEART timer interrupt.
* Level 2 - CPU IPI, CPU debug, power putton, general device interrupts.
* Level 1 - General device interrupts.
* Level 0 - General device GFX flow control interrupts.
*/
#define HEART_L4_INT_MASK 0xfff8000000000000ULL /* IP6 */
#define HEART_L3_INT_MASK 0x0004000000000000ULL /* IP5 */
#define HEART_L2_INT_MASK 0x0003ffff00000000ULL /* IP4 */
#define HEART_L1_INT_MASK 0x00000000ffff0000ULL /* IP3 */
#define HEART_L0_INT_MASK 0x000000000000ffffULL /* IP2 */
/* HEART L0 Interrupts (Low Priority) */
#define HEART_L0_INT_GENERIC 0
#define HEART_L0_INT_FLOW_CTRL_HWTR_0 1
#define HEART_L0_INT_FLOW_CTRL_HWTR_1 2
/* HEART L2 Interrupts (High Priority) */
#define HEART_L2_INT_RESCHED_CPU_0 46
#define HEART_L2_INT_RESCHED_CPU_1 47
#define HEART_L2_INT_CALL_CPU_0 48
#define HEART_L2_INT_CALL_CPU_1 49
/* HEART L3 Interrupts (Compare/Counter Timer) */
#define HEART_L3_INT_TIMER 50
/* HEART L4 Interrupts (Errors) */
#define HEART_L4_INT_XWID_ERR_9 51
#define HEART_L4_INT_XWID_ERR_A 52
#define HEART_L4_INT_XWID_ERR_B 53
#define HEART_L4_INT_XWID_ERR_C 54
#define HEART_L4_INT_XWID_ERR_D 55
#define HEART_L4_INT_XWID_ERR_E 56
#define HEART_L4_INT_XWID_ERR_F 57
#define HEART_L4_INT_XWID_ERR_XBOW 58
#define HEART_L4_INT_CPU_BUS_ERR_0 59
#define HEART_L4_INT_CPU_BUS_ERR_1 60
#define HEART_L4_INT_CPU_BUS_ERR_2 61
#define HEART_L4_INT_CPU_BUS_ERR_3 62
#define HEART_L4_INT_HEART_EXCP 63
/*
* Power Switch is wired via BaseIO BRIDGE slot #6.
*
* ACFail is wired via BaseIO BRIDGE slot #7.
*/
#define IP30_POWER_IRQ HEART_L2_INT_POWER_BTN
#include_next <irq.h>
#define IP30_HEART_L0_IRQ (MIPS_CPU_IRQ_BASE + 2)
#define IP30_HEART_L1_IRQ (MIPS_CPU_IRQ_BASE + 3)
#define IP30_HEART_L2_IRQ (MIPS_CPU_IRQ_BASE + 4)
#define IP30_HEART_TIMER_IRQ (MIPS_CPU_IRQ_BASE + 5)
#define IP30_HEART_ERR_IRQ (MIPS_CPU_IRQ_BASE + 6)
#endif /* __ASM_MACH_IP30_IRQ_H */
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_MACH_IP30_KERNEL_ENTRY_H
#define __ASM_MACH_IP30_KERNEL_ENTRY_H
.macro kernel_entry_setup
.endm
.macro smp_slave_setup
move gp, a0
.endm
#endif /* __ASM_MACH_IP30_KERNEL_ENTRY_H */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2003, 2004 Ralf Baechle
*/
#ifndef __ASM_MACH_IP30_MANGLE_PORT_H
#define __ASM_MACH_IP30_MANGLE_PORT_H
#define __swizzle_addr_b(port) ((port)^3)
#define __swizzle_addr_w(port) ((port)^2)
#define __swizzle_addr_l(port) (port)
#define __swizzle_addr_q(port) (port)
#define ioswabb(a, x) (x)
#define __mem_ioswabb(a, x) (x)
#define ioswabw(a, x) (x)
#define __mem_ioswabw(a, x) cpu_to_le16(x)
#define ioswabl(a, x) (x)
#define __mem_ioswabl(a, x) cpu_to_le32(x)
#define ioswabq(a, x) (x)
#define __mem_ioswabq(a, x) cpu_to_le64(x)
#endif /* __ASM_MACH_IP30_MANGLE_PORT_H */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2016 Joshua Kinard <kumba@gentoo.org>
*
*/
#ifndef _ASM_MACH_IP30_SPACES_H
#define _ASM_MACH_IP30_SPACES_H
/*
* Memory in IP30/Octane is offset 512MB in the physical address space.
*/
#define PHYS_OFFSET _AC(0x20000000, UL)
#ifdef CONFIG_64BIT
#define CAC_BASE _AC(0xA800000000000000, UL)
#endif
#include <asm/mach-generic/spaces.h>
#endif /* _ASM_MACH_IP30_SPACES_H */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2002, 2004, 2007 by Ralf Baechle <ralf@linux-mips.org>
*/
#ifndef __ASM_MIPS_MACH_IP30_WAR_H
#define __ASM_MIPS_MACH_IP30_WAR_H
#define R4600_V1_INDEX_ICACHEOP_WAR 0
#define R4600_V1_HIT_CACHEOP_WAR 0
#define R4600_V2_HIT_CACHEOP_WAR 0
#define MIPS_CACHE_SYNC_WAR 0
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define MIPS4K_ICACHE_REFILL_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#define R5432_CP0_INTERRUPT_WAR 0
#define TX49XX_ICACHE_INDEX_INV_WAR 0
#define ICACHE_REFILLS_WORKAROUND_WAR 0
#ifdef CONFIG_CPU_R10000
#define R10000_LLSC_WAR 1
#else
#define R10000_LLSC_WAR 0
#endif
#endif /* __ASM_MIPS_MACH_IP30_WAR_H */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* HEART chip definitions
*
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* 2009 Johannes Dickgreber <tanzy@gmx.de>
* 2007-2015 Joshua Kinard <kumba@gentoo.org>
*/
#ifndef __ASM_SGI_HEART_H
#define __ASM_SGI_HEART_H
#include <linux/types.h>
#include <linux/time.h>
/*
* There are 8 DIMM slots on an IP30 system
* board, which are grouped into four banks
*/
#define HEART_MEMORY_BANKS 4
/* HEART can support up to four CPUs */
#define HEART_MAX_CPUS 4
#define HEART_XKPHYS_BASE ((void *)(IO_BASE | 0x000000000ff00000ULL))
/**
* struct ip30_heart_regs - struct that maps IP30 HEART registers.
* @mode: HEART_MODE - Purpose Unknown, machine reset called from here.
* @sdram_mode: HEART_SDRAM_MODE - purpose unknown.
* @mem_refresh: HEART_MEM_REF - purpose unknown.
* @mem_req_arb: HEART_MEM_REQ_ARB - purpose unknown.
* @mem_cfg.q: union for 64bit access to HEART_MEMCFG - 4x 64bit registers.
* @mem_cfg.l: union for 32bit access to HEART_MEMCFG - 8x 32bit registers.
* @fc_mode: HEART_FC_MODE - Purpose Unknown, possibly for GFX flow control.
* @fc_timer_limit: HEART_FC_TIMER_LIMIT - purpose unknown.
* @fc_addr: HEART_FC0_ADDR, HEART_FC1_ADDR - purpose unknown.
* @fc_credit_cnt: HEART_FC0_CR_CNT, HEART_FC1_CR_CNT - purpose unknown.
* @fc_timer: HEART_FC0_TIMER, HEART_FC1_TIMER - purpose unknown.
* @status: HEART_STATUS - HEART status information.
* @bus_err_addr: HEART_BERR_ADDR - likely contains addr of recent SIGBUS.
* @bus_err_misc: HEART_BERR_MISC - purpose unknown.
* @mem_err_addr: HEART_MEMERR_ADDR - likely contains addr of recent mem err.
* @mem_err_data: HEART_MEMERR_DATA - purpose unknown.
* @piur_acc_err: HEART_PIUR_ACC_ERR - likely for access err to HEART regs.
* @mlan_clock_div: HEART_MLAN_CLK_DIV - MicroLAN clock divider.
* @mlan_ctrl: HEART_MLAN_CTL - MicroLAN control.
* @__pad0: 0x0f40 bytes of padding -> next HEART register 0x01000.
* @undefined: Undefined/diag register, write to it triggers PIUR_ACC_ERR.
* @__pad1: 0xeff8 bytes of padding -> next HEART register 0x10000.
* @imr: HEART_IMR0 to HEART_IMR3 - per-cpu interrupt mask register.
* @set_isr: HEART_SET_ISR - set interrupt status register.
* @clear_isr: HEART_CLR_ISR - clear interrupt status register.
* @isr: HEART_ISR - interrupt status register (read-only).
* @imsr: HEART_IMSR - purpose unknown.
* @cause: HEART_CAUSE - HEART cause information.
* @__pad2: 0xffb8 bytes of padding -> next HEART register 0x20000.
* @count: HEART_COUNT - 52-bit counter.
* @__pad3: 0xfff8 bytes of padding -> next HEART register 0x30000.
* @compare: HEART_COMPARE - 24-bit compare.
* @__pad4: 0xfff8 bytes of padding -> next HEART register 0x40000.
* @trigger: HEART_TRIGGER - purpose unknown.
* @__pad5: 0xfff8 bytes of padding -> next HEART register 0x50000.
* @cpuid: HEART_PRID - contains CPU ID of CPU currently accessing HEART.
* @__pad6: 0xfff8 bytes of padding -> next HEART register 0x60000.
* @sync: HEART_SYNC - purpose unknown.
*
* HEART is the main system controller ASIC for IP30 system. It incorporates
* a memory controller, interrupt status/cause/set/clear management, basic
* timer with count/compare, and other functionality. For Linux, not all of
* HEART's functions are fully understood.
*
* Implementation note: All HEART registers are 64bits-wide, but the mem_cfg
* register only reports correct values if queried in 32bits. Hence the need
* for a union. Even though mem_cfg.l has 8 array slots, we only ever query
* up to 4 of those. IP30 has 8 DIMM slots arranged into 4 banks, w/ 2 DIMMs
* per bank. Each 32bit read accesses one of these banks. Perhaps HEART was
* designed to address up to 8 banks (16 DIMMs)? We may never know.
*/
struct ip30_heart_regs { /* 0x0ff00000 */
u64 mode; /* + 0x00000 */
/* Memory */
u64 sdram_mode; /* + 0x00008 */
u64 mem_refresh; /* + 0x00010 */
u64 mem_req_arb; /* + 0x00018 */
union {
u64 q[HEART_MEMORY_BANKS]; /* readq() */
u32 l[HEART_MEMORY_BANKS * 2]; /* readl() */
} mem_cfg; /* + 0x00020 */
/* Flow control (gfx?) */
u64 fc_mode; /* + 0x00040 */
u64 fc_timer_limit; /* + 0x00048 */
u64 fc_addr[2]; /* + 0x00050 */
u64 fc_credit_cnt[2]; /* + 0x00060 */
u64 fc_timer[2]; /* + 0x00070 */
/* Status */
u64 status; /* + 0x00080 */
/* Bus error */
u64 bus_err_addr; /* + 0x00088 */
u64 bus_err_misc; /* + 0x00090 */
/* Memory error */
u64 mem_err_addr; /* + 0x00098 */
u64 mem_err_data; /* + 0x000a0 */
/* Misc */
u64 piur_acc_err; /* + 0x000a8 */
u64 mlan_clock_div; /* + 0x000b0 */
u64 mlan_ctrl; /* + 0x000b8 */
u64 __pad0[0x01e8]; /* + 0x000c0 + 0x0f40 */
/* Undefined */
u64 undefined; /* + 0x01000 */
u64 __pad1[0x1dff]; /* + 0x01008 + 0xeff8 */
/* Interrupts */
u64 imr[HEART_MAX_CPUS]; /* + 0x10000 */
u64 set_isr; /* + 0x10020 */
u64 clear_isr; /* + 0x10028 */
u64 isr; /* + 0x10030 */
u64 imsr; /* + 0x10038 */
u64 cause; /* + 0x10040 */
u64 __pad2[0x1ff7]; /* + 0x10048 + 0xffb8 */
/* Timer */
u64 count; /* + 0x20000 */
u64 __pad3[0x1fff]; /* + 0x20008 + 0xfff8 */
u64 compare; /* + 0x30000 */
u64 __pad4[0x1fff]; /* + 0x30008 + 0xfff8 */
u64 trigger; /* + 0x40000 */
u64 __pad5[0x1fff]; /* + 0x40008 + 0xfff8 */
/* Misc */
u64 cpuid; /* + 0x50000 */
u64 __pad6[0x1fff]; /* + 0x50008 + 0xfff8 */
u64 sync; /* + 0x60000 */
};
/* For timer-related bits. */
#define HEART_NS_PER_CYCLE 80
#define HEART_CYCLES_PER_SEC (NSEC_PER_SEC / HEART_NS_PER_CYCLE)
/*
* XXX: Everything below this comment will either go away or be cleaned
* up to fit in better with Linux. A lot of the bit definitions for
* HEART were derived from IRIX's sys/RACER/heart.h header file.
*/
/* HEART Masks */
#define HEART_ATK_MASK 0x0007ffffffffffff /* HEART attack mask */
#define HEART_ACK_ALL_MASK 0xffffffffffffffff /* Ack everything */
#define HEART_CLR_ALL_MASK 0x0000000000000000 /* Clear all */
#define HEART_BR_ERR_MASK 0x7ff8000000000000 /* BRIDGE error mask */
#define HEART_CPU0_ERR_MASK 0x8ff8000000000000 /* CPU0 error mask */
#define HEART_CPU1_ERR_MASK 0x97f8000000000000 /* CPU1 error mask */
#define HEART_CPU2_ERR_MASK 0xa7f8000000000000 /* CPU2 error mask */
#define HEART_CPU3_ERR_MASK 0xc7f8000000000000 /* CPU3 error mask */
#define HEART_ERR_MASK 0x1ff /* HEART error mask */
#define HEART_ERR_MASK_START 51 /* HEART error start */
#define HEART_ERR_MASK_END 63 /* HEART error end */
/* Bits in the HEART_MODE register. */
#define HM_PROC_DISABLE_SHFT 60
#define HM_PROC_DISABLE_MSK (0xfUL << HM_PROC_DISABLE_SHFT)
#define HM_PROC_DISABLE(x) (0x1UL << (x) + HM_PROC_DISABLE_SHFT)
#define HM_MAX_PSR (0x7UL << 57)
#define HM_MAX_IOSR (0x7UL << 54)
#define HM_MAX_PEND_IOSR (0x7UL << 51)
#define HM_TRIG_SRC_SEL_MSK (0x7UL << 48)
#define HM_TRIG_HEART_EXC (0x0UL << 48)
#define HM_TRIG_REG_BIT (0x1UL << 48)
#define HM_TRIG_SYSCLK (0x2UL << 48)
#define HM_TRIG_MEMCLK_2X (0x3UL << 48)
#define HM_TRIG_MEMCLK (0x4UL << 48)
#define HM_TRIG_IOCLK (0x5UL << 48)
#define HM_PIU_TEST_MODE (0xfUL << 40)
#define HM_GP_FLAG_MSK (0xfUL << 36)
#define HM_GP_FLAG(x) BIT((x) + 36)
#define HM_MAX_PROC_HYST (0xfUL << 32)
#define HM_LLP_WRST_AFTER_RST BIT(28)
#define HM_LLP_LINK_RST BIT(27)
#define HM_LLP_WARM_RST BIT(26)
#define HM_COR_ECC_LCK BIT(25)
#define HM_REDUCED_PWR BIT(24)
#define HM_COLD_RST BIT(23)
#define HM_SW_RST BIT(22)
#define HM_MEM_FORCE_WR BIT(21)
#define HM_DB_ERR_GEN BIT(20)
#define HM_SB_ERR_GEN BIT(19)
#define HM_CACHED_PIO_EN BIT(18)
#define HM_CACHED_PROM_EN BIT(17)
#define HM_PE_SYS_COR_ERE BIT(16)
#define HM_GLOBAL_ECC_EN BIT(15)
#define HM_IO_COH_EN BIT(14)
#define HM_INT_EN BIT(13)
#define HM_DATA_CHK_EN BIT(12)
#define HM_REF_EN BIT(11)
#define HM_BAD_SYSWR_ERE BIT(10)
#define HM_BAD_SYSRD_ERE BIT(9)
#define HM_SYSSTATE_ERE BIT(8)
#define HM_SYSCMD_ERE BIT(7)
#define HM_NCOR_SYS_ERE BIT(6)
#define HM_COR_SYS_ERE BIT(5)
#define HM_DATA_ELMNT_ERE BIT(4)
#define HM_MEM_ADDR_PROC_ERE BIT(3)
#define HM_MEM_ADDR_IO_ERE BIT(2)
#define HM_NCOR_MEM_ERE BIT(1)
#define HM_COR_MEM_ERE BIT(0)
/* Bits in the HEART_MEM_REF register. */
#define HEART_MEMREF_REFS(x) ((0xfUL & (x)) << 16)
#define HEART_MEMREF_PERIOD(x) ((0xffffUL & (x)))
#define HEART_MEMREF_REFS_VAL HEART_MEMREF_REFS(8)
#define HEART_MEMREF_PERIOD_VAL HEART_MEMREF_PERIOD(0x4000)
#define HEART_MEMREF_VAL (HEART_MEMREF_REFS_VAL | \
HEART_MEMREF_PERIOD_VAL)
/* Bits in the HEART_MEM_REQ_ARB register. */
#define HEART_MEMARB_IODIS (1 << 20)
#define HEART_MEMARB_MAXPMWRQS (15 << 16)
#define HEART_MEMARB_MAXPMRRQS (15 << 12)
#define HEART_MEMARB_MAXPMRQS (15 << 8)
#define HEART_MEMARB_MAXRRRQS (15 << 4)
#define HEART_MEMARB_MAXGBRRQS (15)
/* Bits in the HEART_MEMCFG<x> registers. */
#define HEART_MEMCFG_VALID 0x80000000 /* Bank is valid */
#define HEART_MEMCFG_DENSITY 0x01c00000 /* Mem density */
#define HEART_MEMCFG_SIZE_MASK 0x003f0000 /* Mem size mask */
#define HEART_MEMCFG_ADDR_MASK 0x000001ff /* Base addr mask */
#define HEART_MEMCFG_SIZE_SHIFT 16 /* Mem size shift */
#define HEART_MEMCFG_DENSITY_SHIFT 22 /* Density Shift */
#define HEART_MEMCFG_UNIT_SHIFT 25 /* Unit Shift, 32MB */
/* Bits in the HEART_STATUS register */
#define HEART_STAT_HSTL_SDRV BIT(14)
#define HEART_STAT_FC_CR_OUT(x) BIT((x) + 12)
#define HEART_STAT_DIR_CNNCT BIT(11)
#define HEART_STAT_TRITON BIT(10)
#define HEART_STAT_R4K BIT(9)
#define HEART_STAT_BIG_ENDIAN BIT(8)
#define HEART_STAT_PROC_SHFT 4
#define HEART_STAT_PROC_MSK (0xfUL << HEART_STAT_PROC_SHFT)
#define HEART_STAT_PROC_ACTIVE(x) (0x1UL << ((x) + HEART_STAT_PROC_SHFT))
#define HEART_STAT_WIDGET_ID 0xf
/* Bits in the HEART_CAUSE register */
#define HC_PE_SYS_COR_ERR_MSK (0xfUL << 60)
#define HC_PE_SYS_COR_ERR(x) BIT((x) + 60)
#define HC_PIOWDB_OFLOW BIT(44)
#define HC_PIORWRB_OFLOW BIT(43)
#define HC_PIUR_ACC_ERR BIT(42)
#define HC_BAD_SYSWR_ERR BIT(41)
#define HC_BAD_SYSRD_ERR BIT(40)
#define HC_SYSSTATE_ERR_MSK (0xfUL << 36)
#define HC_SYSSTATE_ERR(x) BIT((x) + 36)
#define HC_SYSCMD_ERR_MSK (0xfUL << 32)
#define HC_SYSCMD_ERR(x) BIT((x) + 32)
#define HC_NCOR_SYSAD_ERR_MSK (0xfUL << 28)
#define HC_NCOR_SYSAD_ERR(x) BIT((x) + 28)
#define HC_COR_SYSAD_ERR_MSK (0xfUL << 24)
#define HC_COR_SYSAD_ERR(x) BIT((x) + 24)
#define HC_DATA_ELMNT_ERR_MSK (0xfUL << 20)
#define HC_DATA_ELMNT_ERR(x) BIT((x) + 20)
#define HC_WIDGET_ERR BIT(16)
#define HC_MEM_ADDR_ERR_PROC_MSK (0xfUL << 4)
#define HC_MEM_ADDR_ERR_PROC(x) BIT((x) + 4)
#define HC_MEM_ADDR_ERR_IO BIT(2)
#define HC_NCOR_MEM_ERR BIT(1)
#define HC_COR_MEM_ERR BIT(0)
extern struct ip30_heart_regs __iomem *heart_regs;
#define heart_read ____raw_readq
#define heart_write ____raw_writeq
#endif /* __ASM_SGI_HEART_H */
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the IP30 specific kernel interface routines under Linux.
#
obj-y := ip30-irq.o ip30-power.o ip30-setup.o ip30-timer.o ip30-xtalk.o
obj-$(CONFIG_EARLY_PRINTK) += ip30-console.o
obj-$(CONFIG_SMP) += ip30-smp.o
#
# SGI-IP30 (Octane/Octane2)
#
ifdef CONFIG_SGI_IP30
platform-$(CONFIG_SGI_IP30) += sgi-ip30/
cflags-$(CONFIG_SGI_IP30) += -I$(srctree)/arch/mips/include/asm/mach-ip30
load-$(CONFIG_SGI_IP30) += 0xa800000020004000
endif
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __IP30_COMMON_H
#define __IP30_COMMON_H
extern struct plat_smp_ops ip30_smp_ops;
extern void __init ip30_per_cpu_init(void);
#endif /* __IP30_COMMON_H */
// SPDX-License-Identifier: GPL-2.0
#include <linux/io.h>
#include <asm/sn/ioc3.h>
static inline struct ioc3_uartregs *console_uart(void)
{
struct ioc3 *ioc3;
ioc3 = (struct ioc3 *)((void *)(0x900000001f600000));
return &ioc3->sregs.uarta;
}
void prom_putchar(char c)
{
struct ioc3_uartregs *uart = console_uart();
while ((readb(&uart->iu_lsr) & 0x20) == 0)
cpu_relax();
writeb(c, &uart->iu_thr);
}
// SPDX-License-Identifier: GPL-2.0
/*
* ip30-irq.c: Highlevel interrupt handling for IP30 architecture.
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/percpu.h>
#include <linux/spinlock.h>
#include <linux/tick.h>
#include <linux/types.h>
#include <asm/irq_cpu.h>
#include <asm/sgi/heart.h>
struct heart_irq_data {
u64 *irq_mask;
int cpu;
};
static DECLARE_BITMAP(heart_irq_map, HEART_NUM_IRQS);
static DEFINE_PER_CPU(unsigned long, irq_enable_mask);
static inline int heart_alloc_int(void)
{
int bit;
again:
bit = find_first_zero_bit(heart_irq_map, HEART_NUM_IRQS);
if (bit >= HEART_NUM_IRQS)
return -ENOSPC;
if (test_and_set_bit(bit, heart_irq_map))
goto again;
return bit;
}
static void ip30_error_irq(struct irq_desc *desc)
{
u64 pending, mask, cause, error_irqs, err_reg;
int cpu = smp_processor_id();
int i;
pending = heart_read(&heart_regs->isr);
mask = heart_read(&heart_regs->imr[cpu]);
cause = heart_read(&heart_regs->cause);
error_irqs = (pending & HEART_L4_INT_MASK & mask);
/* Bail if there's nothing to process (how did we get here, then?) */
if (unlikely(!error_irqs))
return;
/* Prevent any of the error IRQs from firing again. */
heart_write(mask & ~(pending), &heart_regs->imr[cpu]);
/* Ack all error IRQs. */
heart_write(HEART_L4_INT_MASK, &heart_regs->clear_isr);
/*
* If we also have a cause value, then something happened, so loop
* through the error IRQs and report a "heart attack" for each one
* and print the value of the HEART cause register. This is really
* primitive right now, but it should hopefully work until a more
* robust error handling routine can be put together.
*
* Refer to heart.h for the HC_* macros to work out the cause
* that got us here.
*/
if (cause) {
pr_alert("IP30: CPU%d: HEART ATTACK! ISR = 0x%.16llx, IMR = 0x%.16llx, CAUSE = 0x%.16llx\n",
cpu, pending, mask, cause);
if (cause & HC_COR_MEM_ERR) {
err_reg = heart_read(&heart_regs->mem_err_addr);
pr_alert(" HEART_MEMERR_ADDR = 0x%.16llx\n", err_reg);
}
/* i = 63; i >= 51; i-- */
for (i = HEART_ERR_MASK_END; i >= HEART_ERR_MASK_START; i--)
if ((pending >> i) & 1)
pr_alert(" HEART Error IRQ #%d\n", i);
/* XXX: Seems possible to loop forever here, so panic(). */
panic("IP30: Fatal Error !\n");
}
/* Unmask the error IRQs. */
heart_write(mask, &heart_regs->imr[cpu]);
}
static void ip30_normal_irq(struct irq_desc *desc)
{
int cpu = smp_processor_id();
struct irq_domain *domain;
u64 pend, mask;
int irq;
pend = heart_read(&heart_regs->isr);
mask = (heart_read(&heart_regs->imr[cpu]) &
(HEART_L0_INT_MASK | HEART_L1_INT_MASK | HEART_L2_INT_MASK));
pend &= mask;
if (unlikely(!pend))
return;
#ifdef CONFIG_SMP
if (pend & BIT_ULL(HEART_L2_INT_RESCHED_CPU_0)) {
heart_write(BIT_ULL(HEART_L2_INT_RESCHED_CPU_0),
&heart_regs->clear_isr);
scheduler_ipi();
} else if (pend & BIT_ULL(HEART_L2_INT_RESCHED_CPU_1)) {
heart_write(BIT_ULL(HEART_L2_INT_RESCHED_CPU_1),
&heart_regs->clear_isr);
scheduler_ipi();
} else if (pend & BIT_ULL(HEART_L2_INT_CALL_CPU_0)) {
heart_write(BIT_ULL(HEART_L2_INT_CALL_CPU_0),
&heart_regs->clear_isr);
generic_smp_call_function_interrupt();
} else if (pend & BIT_ULL(HEART_L2_INT_CALL_CPU_1)) {
heart_write(BIT_ULL(HEART_L2_INT_CALL_CPU_1),
&heart_regs->clear_isr);
generic_smp_call_function_interrupt();
} else
#endif
{
domain = irq_desc_get_handler_data(desc);
irq = irq_linear_revmap(domain, __ffs(pend));
if (irq)
generic_handle_irq(irq);
else
spurious_interrupt();
}
}
static void ip30_ack_heart_irq(struct irq_data *d)
{
heart_write(BIT_ULL(d->hwirq), &heart_regs->clear_isr);
}
static void ip30_mask_heart_irq(struct irq_data *d)
{
struct heart_irq_data *hd = irq_data_get_irq_chip_data(d);
unsigned long *mask = &per_cpu(irq_enable_mask, hd->cpu);
clear_bit(d->hwirq, mask);
heart_write(*mask, &heart_regs->imr[hd->cpu]);
}
static void ip30_mask_and_ack_heart_irq(struct irq_data *d)
{
struct heart_irq_data *hd = irq_data_get_irq_chip_data(d);
unsigned long *mask = &per_cpu(irq_enable_mask, hd->cpu);
clear_bit(d->hwirq, mask);
heart_write(*mask, &heart_regs->imr[hd->cpu]);
heart_write(BIT_ULL(d->hwirq), &heart_regs->clear_isr);
}
static void ip30_unmask_heart_irq(struct irq_data *d)
{
struct heart_irq_data *hd = irq_data_get_irq_chip_data(d);
unsigned long *mask = &per_cpu(irq_enable_mask, hd->cpu);
set_bit(d->hwirq, mask);
heart_write(*mask, &heart_regs->imr[hd->cpu]);
}
static int ip30_set_heart_irq_affinity(struct irq_data *d,
const struct cpumask *mask, bool force)
{
struct heart_irq_data *hd = irq_data_get_irq_chip_data(d);
if (!hd)
return -EINVAL;
if (irqd_is_started(d))
ip30_mask_and_ack_heart_irq(d);
hd->cpu = cpumask_first_and(mask, cpu_online_mask);
if (irqd_is_started(d))
ip30_unmask_heart_irq(d);
irq_data_update_effective_affinity(d, cpumask_of(hd->cpu));
return 0;
}
static struct irq_chip heart_irq_chip = {
.name = "HEART",
.irq_ack = ip30_ack_heart_irq,
.irq_mask = ip30_mask_heart_irq,
.irq_mask_ack = ip30_mask_and_ack_heart_irq,
.irq_unmask = ip30_unmask_heart_irq,
.irq_set_affinity = ip30_set_heart_irq_affinity,
};
static int heart_domain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
struct irq_alloc_info *info = arg;
struct heart_irq_data *hd;
int hwirq;
if (nr_irqs > 1 || !info)
return -EINVAL;
hd = kzalloc(sizeof(*hd), GFP_KERNEL);
if (!hd)
return -ENOMEM;
hwirq = heart_alloc_int();
if (hwirq < 0) {
kfree(hd);
return -EAGAIN;
}
irq_domain_set_info(domain, virq, hwirq, &heart_irq_chip, hd,
handle_level_irq, NULL, NULL);
return 0;
}
static void heart_domain_free(struct irq_domain *domain,
unsigned int virq, unsigned int nr_irqs)
{
struct irq_data *irqd;
if (nr_irqs > 1)
return;
irqd = irq_domain_get_irq_data(domain, virq);
clear_bit(irqd->hwirq, heart_irq_map);
if (irqd && irqd->chip_data)
kfree(irqd->chip_data);
}
static const struct irq_domain_ops heart_domain_ops = {
.alloc = heart_domain_alloc,
.free = heart_domain_free,
};
void __init ip30_install_ipi(void)
{
int cpu = smp_processor_id();
unsigned long *mask = &per_cpu(irq_enable_mask, cpu);
set_bit(HEART_L2_INT_RESCHED_CPU_0 + cpu, mask);
heart_write(BIT_ULL(HEART_L2_INT_RESCHED_CPU_0 + cpu),
&heart_regs->clear_isr);
set_bit(HEART_L2_INT_CALL_CPU_0 + cpu, mask);
heart_write(BIT_ULL(HEART_L2_INT_CALL_CPU_0 + cpu),
&heart_regs->clear_isr);
heart_write(*mask, &heart_regs->imr[cpu]);
}
void __init arch_init_irq(void)
{
struct irq_domain *domain;
struct fwnode_handle *fn;
unsigned long *mask;
int i;
mips_cpu_irq_init();
/* Mask all IRQs. */
heart_write(HEART_CLR_ALL_MASK, &heart_regs->imr[0]);
heart_write(HEART_CLR_ALL_MASK, &heart_regs->imr[1]);
heart_write(HEART_CLR_ALL_MASK, &heart_regs->imr[2]);
heart_write(HEART_CLR_ALL_MASK, &heart_regs->imr[3]);
/* Ack everything. */
heart_write(HEART_ACK_ALL_MASK, &heart_regs->clear_isr);
/* Enable specific HEART error IRQs for each CPU. */
mask = &per_cpu(irq_enable_mask, 0);
*mask |= HEART_CPU0_ERR_MASK;
heart_write(*mask, &heart_regs->imr[0]);
mask = &per_cpu(irq_enable_mask, 1);
*mask |= HEART_CPU1_ERR_MASK;
heart_write(*mask, &heart_regs->imr[1]);
/*
* Some HEART bits are reserved by hardware or by software convention.
* Mark these as reserved right away so they won't be accidentally
* used later.
*/
set_bit(HEART_L0_INT_GENERIC, heart_irq_map);
set_bit(HEART_L0_INT_FLOW_CTRL_HWTR_0, heart_irq_map);
set_bit(HEART_L0_INT_FLOW_CTRL_HWTR_1, heart_irq_map);
set_bit(HEART_L2_INT_RESCHED_CPU_0, heart_irq_map);
set_bit(HEART_L2_INT_RESCHED_CPU_1, heart_irq_map);
set_bit(HEART_L2_INT_CALL_CPU_0, heart_irq_map);
set_bit(HEART_L2_INT_CALL_CPU_1, heart_irq_map);
set_bit(HEART_L3_INT_TIMER, heart_irq_map);
/* Reserve the error interrupts (#51 to #63). */
for (i = HEART_L4_INT_XWID_ERR_9; i <= HEART_L4_INT_HEART_EXCP; i++)
set_bit(i, heart_irq_map);
fn = irq_domain_alloc_named_fwnode("HEART");
WARN_ON(fn == NULL);
if (!fn)
return;
domain = irq_domain_create_linear(fn, HEART_NUM_IRQS,
&heart_domain_ops, NULL);
WARN_ON(domain == NULL);
if (!domain)
return;
irq_set_default_host(domain);
irq_set_percpu_devid(IP30_HEART_L0_IRQ);
irq_set_chained_handler_and_data(IP30_HEART_L0_IRQ, ip30_normal_irq,
domain);
irq_set_percpu_devid(IP30_HEART_L1_IRQ);
irq_set_chained_handler_and_data(IP30_HEART_L1_IRQ, ip30_normal_irq,
domain);
irq_set_percpu_devid(IP30_HEART_L2_IRQ);
irq_set_chained_handler_and_data(IP30_HEART_L2_IRQ, ip30_normal_irq,
domain);
irq_set_percpu_devid(IP30_HEART_ERR_IRQ);
irq_set_chained_handler_and_data(IP30_HEART_ERR_IRQ, ip30_error_irq,
domain);
}
// SPDX-License-Identifier: GPL-2.0
/*
* ip30-power.c: Software powerdown and reset handling for IP30 architecture.
*
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* 2014 Joshua Kinard <kumba@gentoo.org>
* 2009 Johannes Dickgreber <tanzy@gmx.de>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/notifier.h>
#include <linux/delay.h>
#include <linux/rtc/ds1685.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <asm/reboot.h>
#include <asm/sgi/heart.h>
static void __noreturn ip30_machine_restart(char *cmd)
{
/*
* Execute HEART cold reset
* Yes, it's cold-HEARTed!
*/
heart_write((heart_read(&heart_regs->mode) | HM_COLD_RST),
&heart_regs->mode);
unreachable();
}
static int __init ip30_reboot_setup(void)
{
_machine_restart = ip30_machine_restart;
return 0;
}
subsys_initcall(ip30_reboot_setup);
// SPDX-License-Identifier: GPL-2.0
/*
* SGI IP30 miscellaneous setup bits.
*
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* 2007 Joshua Kinard <kumba@gentoo.org>
* 2009 Johannes Dickgreber <tanzy@gmx.de>
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/memblock.h>
#include <asm/smp-ops.h>
#include <asm/sgialib.h>
#include <asm/time.h>
#include <asm/sgi/heart.h>
#include "ip30-common.h"
/* Structure of accessible HEART registers located in XKPHYS space. */
struct ip30_heart_regs __iomem *heart_regs = HEART_XKPHYS_BASE;
/*
* ARCS will report up to the first 1GB of
* memory if queried. Anything beyond that
* is marked as reserved.
*/
#define IP30_MAX_PROM_MEMORY _AC(0x40000000, UL)
/*
* Memory in the Octane starts at 512MB
*/
#define IP30_MEMORY_BASE _AC(0x20000000, UL)
/*
* If using ARCS to probe for memory, then
* remaining memory will start at this offset.
*/
#define IP30_REAL_MEMORY_START (IP30_MEMORY_BASE + IP30_MAX_PROM_MEMORY)
#define MEM_SHIFT(x) ((x) >> 20)
static void __init ip30_mem_init(void)
{
unsigned long total_mem;
phys_addr_t addr;
phys_addr_t size;
u32 memcfg;
int i;
total_mem = 0;
for (i = 0; i < HEART_MEMORY_BANKS; i++) {
memcfg = __raw_readl(&heart_regs->mem_cfg.l[i]);
if (!(memcfg & HEART_MEMCFG_VALID))
continue;
addr = memcfg & HEART_MEMCFG_ADDR_MASK;
addr <<= HEART_MEMCFG_UNIT_SHIFT;
addr += IP30_MEMORY_BASE;
size = memcfg & HEART_MEMCFG_SIZE_MASK;
size >>= HEART_MEMCFG_SIZE_SHIFT;
size += 1;
size <<= HEART_MEMCFG_UNIT_SHIFT;
total_mem += size;
if (addr >= IP30_REAL_MEMORY_START)
memblock_free(addr, size);
else if ((addr + size) > IP30_REAL_MEMORY_START)
memblock_free(IP30_REAL_MEMORY_START,
size - IP30_MAX_PROM_MEMORY);
}
pr_info("Detected %luMB of physical memory.\n", MEM_SHIFT(total_mem));
}
/**
* ip30_cpu_time_init - platform time initialization.
*/
static void __init ip30_cpu_time_init(void)
{
int cpu = smp_processor_id();
u64 heart_compare;
unsigned int start, end;
int time_diff;
heart_compare = (heart_read(&heart_regs->count) +
(HEART_CYCLES_PER_SEC / 10));
start = read_c0_count();
while ((heart_read(&heart_regs->count) - heart_compare) & 0x800000)
cpu_relax();
end = read_c0_count();
time_diff = (int)end - (int)start;
mips_hpt_frequency = time_diff * 10;
pr_info("IP30: CPU%d: %d MHz CPU detected.\n", cpu,
(mips_hpt_frequency * 2) / 1000000);
}
void __init ip30_per_cpu_init(void)
{
/* Disable all interrupts. */
clear_c0_status(ST0_IM);
ip30_cpu_time_init();
#ifdef CONFIG_SMP
ip30_install_ipi();
#endif
enable_percpu_irq(IP30_HEART_L0_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP30_HEART_L1_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP30_HEART_L2_IRQ, IRQ_TYPE_NONE);
enable_percpu_irq(IP30_HEART_ERR_IRQ, IRQ_TYPE_NONE);
}
/**
* plat_mem_setup - despite the name, misc setup happens here.
*/
void __init plat_mem_setup(void)
{
ip30_mem_init();
/* XXX: Hard lock on /sbin/init if this flag isn't specified. */
prom_flags |= PROM_FLAG_DONT_FREE_TEMP;
#ifdef CONFIG_SMP
register_smp_ops(&ip30_smp_ops);
#else
ip30_per_cpu_init();
#endif
ioport_resource.start = 0;
ioport_resource.end = ~0UL;
set_io_port_base(IO_BASE);
}
// SPDX-License-Identifier: GPL-2.0
/*
* ip30-smp.c: SMP on IP30 architecture.
* Based off of the original IP30 SMP code, with inspiration from ip27-smp.c
* and smp-bmips.c.
*
* Copyright (C) 2005-2007 Stanislaw Skowronek <skylark@unaligned.org>
* 2006-2007, 2014-2015 Joshua Kinard <kumba@gentoo.org>
* 2009 Johannes Dickgreber <tanzy@gmx.de>
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <asm/time.h>
#include <asm/sgi/heart.h>
#include "ip30-common.h"
#define MPCONF_MAGIC 0xbaddeed2
#define MPCONF_ADDR 0xa800000000000600L
#define MPCONF_SIZE 0x80
#define MPCONF(x) (MPCONF_ADDR + (x) * MPCONF_SIZE)
/* HEART can theoretically do 4 CPUs, but only 2 are physically possible */
#define MP_NCPU 2
struct mpconf {
u32 magic;
u32 prid;
u32 physid;
u32 virtid;
u32 scachesz;
u16 fanloads;
u16 res;
void *launch;
void *rendezvous;
u64 res2[3];
void *stackaddr;
void *lnch_parm;
void *rndv_parm;
u32 idleflag;
};
static void ip30_smp_send_ipi_single(int cpu, u32 action)
{
int irq;
switch (action) {
case SMP_RESCHEDULE_YOURSELF:
irq = HEART_L2_INT_RESCHED_CPU_0;
break;
case SMP_CALL_FUNCTION:
irq = HEART_L2_INT_CALL_CPU_0;
break;
default:
panic("IP30: Unknown action value in %s!\n", __func__);
}
irq += cpu;
/* Poke the other CPU -- it's got mail! */
heart_write(BIT_ULL(irq), &heart_regs->set_isr);
}
static void ip30_smp_send_ipi_mask(const struct cpumask *mask, u32 action)
{
u32 i;
for_each_cpu(i, mask)
ip30_smp_send_ipi_single(i, action);
}
static void __init ip30_smp_setup(void)
{
int i;
int ncpu = 0;
struct mpconf *mpc;
init_cpu_possible(cpumask_of(0));
/* Scan the MPCONF structure and enumerate available CPUs. */
for (i = 0; i < MP_NCPU; i++) {
mpc = (struct mpconf *)MPCONF(i);
if (mpc->magic == MPCONF_MAGIC) {
set_cpu_possible(i, true);
__cpu_number_map[i] = ++ncpu;
__cpu_logical_map[ncpu] = i;
pr_info("IP30: Slot: %d, PrID: %.8x, PhyID: %d, VirtID: %d\n",
i, mpc->prid, mpc->physid, mpc->virtid);
}
}
pr_info("IP30: Detected %d CPU(s) present.\n", ncpu);
/*
* Set the coherency algorithm to '5' (cacheable coherent
* exclusive on write). This is needed on IP30 SMP, especially
* for R14000 CPUs, otherwise, instruction bus errors will
* occur upon reaching userland.
*/
change_c0_config(CONF_CM_CMASK, CONF_CM_CACHABLE_COW);
}
static void __init ip30_smp_prepare_cpus(unsigned int max_cpus)
{
/* nothing to do here */
}
static int __init ip30_smp_boot_secondary(int cpu, struct task_struct *idle)
{
struct mpconf *mpc = (struct mpconf *)MPCONF(cpu);
/* Stack pointer (sp). */
mpc->stackaddr = (void *)__KSTK_TOS(idle);
/* Global pointer (gp). */
mpc->lnch_parm = task_thread_info(idle);
mb(); /* make sure stack and lparm are written */
/* Boot CPUx. */
mpc->launch = smp_bootstrap;
/* CPUx now executes smp_bootstrap, then ip30_smp_finish */
return 0;
}
static void __init ip30_smp_init_cpu(void)
{
ip30_per_cpu_init();
}
static void __init ip30_smp_finish(void)
{
enable_percpu_irq(get_c0_compare_int(), IRQ_TYPE_NONE);
local_irq_enable();
}
struct plat_smp_ops __read_mostly ip30_smp_ops = {
.send_ipi_single = ip30_smp_send_ipi_single,
.send_ipi_mask = ip30_smp_send_ipi_mask,
.smp_setup = ip30_smp_setup,
.prepare_cpus = ip30_smp_prepare_cpus,
.boot_secondary = ip30_smp_boot_secondary,
.init_secondary = ip30_smp_init_cpu,
.smp_finish = ip30_smp_finish,
.prepare_boot_cpu = ip30_smp_init_cpu,
};
// SPDX-License-Identifier: GPL-2.0
/*
* ip30-timer.c: Clocksource/clockevent support for the
* HEART chip in SGI Octane (IP30) systems.
*
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de>
* Copyright (C) 2011 Joshua Kinard <kumba@gentoo.org>
*/
#include <linux/clocksource.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/percpu.h>
#include <linux/sched_clock.h>
#include <asm/time.h>
#include <asm/cevt-r4k.h>
#include <asm/sgi/heart.h>
static u64 ip30_heart_counter_read(struct clocksource *cs)
{
return heart_read(&heart_regs->count);
}
struct clocksource ip30_heart_clocksource = {
.name = "HEART",
.rating = 400,
.read = ip30_heart_counter_read,
.mask = CLOCKSOURCE_MASK(52),
.flags = (CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_VALID_FOR_HRES),
};
static u64 notrace ip30_heart_read_sched_clock(void)
{
return heart_read(&heart_regs->count);
}
static void __init ip30_heart_clocksource_init(void)
{
struct clocksource *cs = &ip30_heart_clocksource;
clocksource_register_hz(cs, HEART_CYCLES_PER_SEC);
sched_clock_register(ip30_heart_read_sched_clock, 52,
HEART_CYCLES_PER_SEC);
}
void __init plat_time_init(void)
{
int irq = get_c0_compare_int();
cp0_timer_irq_installed = 1;
c0_compare_irqaction.percpu_dev_id = &mips_clockevent_device;
c0_compare_irqaction.flags &= ~IRQF_SHARED;
irq_set_handler(irq, handle_percpu_devid_irq);
irq_set_percpu_devid(irq);
setup_percpu_irq(irq, &c0_compare_irqaction);
enable_percpu_irq(irq, IRQ_TYPE_NONE);
ip30_heart_clocksource_init();
}
// SPDX-License-Identifier: GPL-2.0
/*
* ip30-xtalk.c - Very basic Crosstalk (XIO) detection support.
* Copyright (C) 2004-2007 Stanislaw Skowronek <skylark@unaligned.org>
* Copyright (C) 2009 Johannes Dickgreber <tanzy@gmx.de>
* Copyright (C) 2007, 2014-2016 Joshua Kinard <kumba@gentoo.org>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/platform_data/sgi-w1.h>
#include <linux/platform_data/xtalk-bridge.h>
#include <asm/xtalk/xwidget.h>
#include <asm/pci/bridge.h>
#define IP30_SWIN_BASE(widget) \
(0x0000000010000000 | (((unsigned long)(widget)) << 24))
#define IP30_RAW_SWIN_BASE(widget) (IO_BASE + IP30_SWIN_BASE(widget))
#define IP30_SWIN_SIZE (1 << 24)
#define IP30_WIDGET_XBOW _AC(0x0, UL) /* XBow is always 0 */
#define IP30_WIDGET_HEART _AC(0x8, UL) /* HEART is always 8 */
#define IP30_WIDGET_PCI_BASE _AC(0xf, UL) /* BaseIO PCI is always 15 */
#define XTALK_NODEV 0xffffffff
#define XBOW_REG_LINK_STAT_0 0x114
#define XBOW_REG_LINK_BLK_SIZE 0x40
#define XBOW_REG_LINK_ALIVE 0x80000000
#define HEART_INTR_ADDR 0x00000080
#define xtalk_read __raw_readl
static void bridge_platform_create(int widget, int masterwid)
{
struct xtalk_bridge_platform_data *bd;
struct sgi_w1_platform_data *wd;
struct platform_device *pdev;
struct resource w1_res;
wd = kzalloc(sizeof(*wd), GFP_KERNEL);
if (!wd)
goto no_mem;
snprintf(wd->dev_id, sizeof(wd->dev_id), "bridge-%012lx",
IP30_SWIN_BASE(widget));
memset(&w1_res, 0, sizeof(w1_res));
w1_res.start = IP30_SWIN_BASE(widget) +
offsetof(struct bridge_regs, b_nic);
w1_res.end = w1_res.start + 3;
w1_res.flags = IORESOURCE_MEM;
pdev = platform_device_alloc("sgi_w1", PLATFORM_DEVID_AUTO);
if (!pdev) {
kfree(wd);
goto no_mem;
}
platform_device_add_resources(pdev, &w1_res, 1);
platform_device_add_data(pdev, wd, sizeof(*wd));
platform_device_add(pdev);
bd = kzalloc(sizeof(*bd), GFP_KERNEL);
if (!bd)
goto no_mem;
pdev = platform_device_alloc("xtalk-bridge", PLATFORM_DEVID_AUTO);
if (!pdev) {
kfree(bd);
goto no_mem;
}
bd->bridge_addr = IP30_RAW_SWIN_BASE(widget);
bd->intr_addr = HEART_INTR_ADDR;
bd->nasid = 0;
bd->masterwid = masterwid;
bd->mem.name = "Bridge PCI MEM";
bd->mem.start = IP30_SWIN_BASE(widget) + BRIDGE_DEVIO0;
bd->mem.end = IP30_SWIN_BASE(widget) + IP30_SWIN_SIZE - 1;
bd->mem.flags = IORESOURCE_MEM;
bd->mem_offset = IP30_SWIN_BASE(widget);
bd->io.name = "Bridge PCI IO";
bd->io.start = IP30_SWIN_BASE(widget) + BRIDGE_DEVIO0;
bd->io.end = IP30_SWIN_BASE(widget) + IP30_SWIN_SIZE - 1;
bd->io.flags = IORESOURCE_IO;
bd->io_offset = IP30_SWIN_BASE(widget);
platform_device_add_data(pdev, bd, sizeof(*bd));
platform_device_add(pdev);
pr_info("xtalk:%x bridge widget\n", widget);
return;
no_mem:
pr_warn("xtalk:%x bridge create out of memory\n", widget);
}
static unsigned int __init xbow_widget_active(s8 wid)
{
unsigned int link_stat;
link_stat = xtalk_read((void *)(IP30_RAW_SWIN_BASE(IP30_WIDGET_XBOW) +
XBOW_REG_LINK_STAT_0 +
XBOW_REG_LINK_BLK_SIZE *
(wid - 8)));
return (link_stat & XBOW_REG_LINK_ALIVE) ? 1 : 0;
}
static void __init xtalk_init_widget(s8 wid, s8 masterwid)
{
xwidget_part_num_t partnum;
widgetreg_t widget_id;
if (!xbow_widget_active(wid))
return;
widget_id = xtalk_read((void *)(IP30_RAW_SWIN_BASE(wid) + WIDGET_ID));
partnum = XWIDGET_PART_NUM(widget_id);
switch (partnum) {
case BRIDGE_WIDGET_PART_NUM:
case XBRIDGE_WIDGET_PART_NUM:
bridge_platform_create(wid, masterwid);
break;
default:
pr_info("xtalk:%x unknown widget (0x%x)\n", wid, partnum);
break;
}
}
static int __init ip30_xtalk_init(void)
{
int i;
/*
* Walk widget IDs backwards so that BaseIO is probed first. This
* ensures that the BaseIO IOC3 is always detected as eth0.
*/
for (i = IP30_WIDGET_PCI_BASE; i > IP30_WIDGET_HEART; i--)
xtalk_init_widget(i, IP30_WIDGET_HEART);
return 0;
}
arch_initcall(ip30_xtalk_init);
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