[PATCH v2 20/28] sparc32: Drop additional sun4d bits
From: Sam Ravnborg via B4 Relay
Date: Sat Mar 09 2024 - 13:22:03 EST
From: Sam Ravnborg <sam@xxxxxxxxxxxx>
Drop sun4d specific support. Not used by LEON.
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
---
arch/sparc/include/asm/io-unit.h | 59 --------
arch/sparc/include/asm/obio.h | 226 -------------------------------
arch/sparc/include/asm/sbi.h | 116 ----------------
arch/sparc/kernel/entry.S | 1 -
arch/sparc/kernel/ioport.c | 1 -
arch/sparc/mm/Makefile | 2 +-
arch/sparc/mm/io-unit.c | 283 ---------------------------------------
arch/sparc/mm/srmmu.c | 1 -
8 files changed, 1 insertion(+), 688 deletions(-)
diff --git a/arch/sparc/include/asm/io-unit.h b/arch/sparc/include/asm/io-unit.h
deleted file mode 100644
index 8c38f5b9f927..000000000000
--- a/arch/sparc/include/asm/io-unit.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* io-unit.h: Definitions for the sun4d IO-UNIT.
- *
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@xxxxxxxxxxxxxxxxxxx)
- */
-#ifndef _SPARC_IO_UNIT_H
-#define _SPARC_IO_UNIT_H
-
-#include <linux/spinlock.h>
-#include <linux/pgtable.h>
-#include <asm/page.h>
-
-/* The io-unit handles all virtual to physical address translations
- * that occur between the SBUS and physical memory. Access by
- * the cpu to IO registers and similar go over the xdbus so are
- * translated by the on chip SRMMU. The io-unit and the srmmu do
- * not need to have the same translations at all, in fact most
- * of the time the translations they handle are a disjunct set.
- * Basically the io-unit handles all dvma sbus activity.
- */
-
-/* AIEEE, unlike the nice sun4m, these monsters have
- fixed DMA range 64M */
-
-#define IOUNIT_DMA_BASE 0xfc000000 /* TOP - 64M */
-#define IOUNIT_DMA_SIZE 0x04000000 /* 64M */
-/* We use last 1M for sparc_dvma_malloc */
-#define IOUNIT_DVMA_SIZE 0x00100000 /* 1M */
-
-/* The format of an iopte in the external page tables */
-#define IOUPTE_PAGE 0xffffff00 /* Physical page number (PA[35:12]) */
-#define IOUPTE_CACHE 0x00000080 /* Cached (in Viking/MXCC) */
-/* XXX Jakub, find out how to program SBUS streaming cache on XDBUS/sun4d.
- * XXX Actually, all you should need to do is find out where the registers
- * XXX are and copy over the sparc64 implementation I wrote. There may be
- * XXX some horrible hwbugs though, so be careful. -DaveM
- */
-#define IOUPTE_STREAM 0x00000040 /* Translation can use streaming cache */
-#define IOUPTE_INTRA 0x00000008 /* SBUS direct slot->slot transfer */
-#define IOUPTE_WRITE 0x00000004 /* Writeable */
-#define IOUPTE_VALID 0x00000002 /* IOPTE is valid */
-#define IOUPTE_PARITY 0x00000001 /* Parity is checked during DVMA */
-
-struct iounit_struct {
- unsigned long bmap[(IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 3)) / sizeof(unsigned long)];
- spinlock_t lock;
- iopte_t __iomem *page_table;
- unsigned long rotor[3];
- unsigned long limit[4];
-};
-
-#define IOUNIT_BMAP1_START 0x00000000
-#define IOUNIT_BMAP1_END (IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 1))
-#define IOUNIT_BMAP2_START IOUNIT_BMAP1_END
-#define IOUNIT_BMAP2_END IOUNIT_BMAP2_START + (IOUNIT_DMA_SIZE >> (PAGE_SHIFT + 2))
-#define IOUNIT_BMAPM_START IOUNIT_BMAP2_END
-#define IOUNIT_BMAPM_END ((IOUNIT_DMA_SIZE - IOUNIT_DVMA_SIZE) >> PAGE_SHIFT)
-
-#endif /* !(_SPARC_IO_UNIT_H) */
diff --git a/arch/sparc/include/asm/obio.h b/arch/sparc/include/asm/obio.h
deleted file mode 100644
index 1b151f738b00..000000000000
--- a/arch/sparc/include/asm/obio.h
+++ /dev/null
@@ -1,226 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * obio.h: Some useful locations in 0xFXXXXXXXX PA obio space on sun4d.
- *
- * Copyright (C) 1997 Jakub Jelinek <jj@xxxxxxxxxxxxxxxxxxx>
- */
-
-#ifndef _SPARC_OBIO_H
-#define _SPARC_OBIO_H
-
-#include <asm/asi.h>
-
-/* This weird monster likes to use the very upper parts of
- 36bit PA for these things :) */
-
-/* CSR space (for each XDBUS)
- * ------------------------------------------------------------------------
- * | 0xFE | DEVID | | XDBUS ID | |
- * ------------------------------------------------------------------------
- * 35 28 27 20 19 10 9 8 7 0
- */
-
-#define CSR_BASE_ADDR 0xe0000000
-#define CSR_CPU_SHIFT (32 - 4 - 5)
-#define CSR_XDBUS_SHIFT 8
-
-#define CSR_BASE(cpu) (((CSR_BASE_ADDR >> CSR_CPU_SHIFT) + cpu) << CSR_CPU_SHIFT)
-
-/* ECSR space (not for each XDBUS)
- * ------------------------------------------------------------------------
- * | 0xF | DEVID[7:1] | |
- * ------------------------------------------------------------------------
- * 35 32 31 25 24 0
- */
-
-#define ECSR_BASE_ADDR 0x00000000
-#define ECSR_CPU_SHIFT (32 - 5)
-#define ECSR_DEV_SHIFT (32 - 8)
-
-#define ECSR_BASE(cpu) ((cpu) << ECSR_CPU_SHIFT)
-#define ECSR_DEV_BASE(devid) ((devid) << ECSR_DEV_SHIFT)
-
-/* Bus Watcher */
-#define BW_LOCAL_BASE 0xfff00000
-
-#define BW_CID 0x00000000
-#define BW_DBUS_CTRL 0x00000008
-#define BW_DBUS_DATA 0x00000010
-#define BW_CTRL 0x00001000
-#define BW_INTR_TABLE 0x00001040
-#define BW_INTR_TABLE_CLEAR 0x00001080
-#define BW_PRESCALER 0x000010c0
-#define BW_PTIMER_LIMIT 0x00002000
-#define BW_PTIMER_COUNTER2 0x00002004
-#define BW_PTIMER_NDLIMIT 0x00002008
-#define BW_PTIMER_CTRL 0x0000200c
-#define BW_PTIMER_COUNTER 0x00002010
-#define BW_TIMER_LIMIT 0x00003000
-#define BW_TIMER_COUNTER2 0x00003004
-#define BW_TIMER_NDLIMIT 0x00003008
-#define BW_TIMER_CTRL 0x0000300c
-#define BW_TIMER_COUNTER 0x00003010
-
-/* BW Control */
-#define BW_CTRL_USER_TIMER 0x00000004 /* Is User Timer Free run enabled */
-
-/* Boot Bus */
-#define BB_LOCAL_BASE 0xf0000000
-
-#define BB_STAT1 0x00100000
-#define BB_STAT2 0x00120000
-#define BB_STAT3 0x00140000
-#define BB_LEDS 0x002e0000
-
-/* Bits in BB_STAT2 */
-#define BB_STAT2_AC_INTR 0x04 /* Aiee! 5ms and power is gone... */
-#define BB_STAT2_TMP_INTR 0x10 /* My Penguins are burning. Are you able to smell it? */
-#define BB_STAT2_FAN_INTR 0x20 /* My fan refuses to work */
-#define BB_STAT2_PWR_INTR 0x40 /* On SC2000, one of the two ACs died. Ok, we go on... */
-#define BB_STAT2_MASK (BB_STAT2_AC_INTR|BB_STAT2_TMP_INTR|BB_STAT2_FAN_INTR|BB_STAT2_PWR_INTR)
-
-/* Cache Controller */
-#define CC_BASE 0x1F00000
-#define CC_DATSTREAM 0x1F00000 /* Data stream register */
-#define CC_DATSIZE 0x1F0003F /* Size */
-#define CC_SRCSTREAM 0x1F00100 /* Source stream register */
-#define CC_DESSTREAM 0x1F00200 /* Destination stream register */
-#define CC_RMCOUNT 0x1F00300 /* Count of references and misses */
-#define CC_IPEN 0x1F00406 /* Pending Interrupts */
-#define CC_IMSK 0x1F00506 /* Interrupt Mask */
-#define CC_ICLR 0x1F00606 /* Clear pending Interrupts */
-#define CC_IGEN 0x1F00704 /* Generate Interrupt register */
-#define CC_STEST 0x1F00804 /* Internal self-test */
-#define CC_CREG 0x1F00A04 /* Control register */
-#define CC_SREG 0x1F00B00 /* Status register */
-#define CC_RREG 0x1F00C04 /* Reset register */
-#define CC_EREG 0x1F00E00 /* Error code register */
-#define CC_CID 0x1F00F04 /* Component ID */
-
-#ifndef __ASSEMBLY__
-
-static inline int bw_get_intr_mask(int sbus_level)
-{
- int mask;
-
- __asm__ __volatile__ ("lduha [%1] %2, %0" :
- "=r" (mask) :
- "r" (BW_LOCAL_BASE + BW_INTR_TABLE + (sbus_level << 3)),
- "i" (ASI_M_CTL));
- return mask;
-}
-
-static inline void bw_clear_intr_mask(int sbus_level, int mask)
-{
- __asm__ __volatile__ ("stha %0, [%1] %2" : :
- "r" (mask),
- "r" (BW_LOCAL_BASE + BW_INTR_TABLE_CLEAR + (sbus_level << 3)),
- "i" (ASI_M_CTL));
-}
-
-static inline unsigned int bw_get_prof_limit(int cpu)
-{
- unsigned int limit;
-
- __asm__ __volatile__ ("lda [%1] %2, %0" :
- "=r" (limit) :
- "r" (CSR_BASE(cpu) + BW_PTIMER_LIMIT),
- "i" (ASI_M_CTL));
- return limit;
-}
-
-static inline void bw_set_prof_limit(int cpu, unsigned int limit)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (limit),
- "r" (CSR_BASE(cpu) + BW_PTIMER_LIMIT),
- "i" (ASI_M_CTL));
-}
-
-static inline unsigned int bw_get_ctrl(int cpu)
-{
- unsigned int ctrl;
-
- __asm__ __volatile__ ("lda [%1] %2, %0" :
- "=r" (ctrl) :
- "r" (CSR_BASE(cpu) + BW_CTRL),
- "i" (ASI_M_CTL));
- return ctrl;
-}
-
-static inline void bw_set_ctrl(int cpu, unsigned int ctrl)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (ctrl),
- "r" (CSR_BASE(cpu) + BW_CTRL),
- "i" (ASI_M_CTL));
-}
-
-static inline unsigned int cc_get_ipen(void)
-{
- unsigned int pending;
-
- __asm__ __volatile__ ("lduha [%1] %2, %0" :
- "=r" (pending) :
- "r" (CC_IPEN),
- "i" (ASI_M_MXCC));
- return pending;
-}
-
-static inline void cc_set_iclr(unsigned int clear)
-{
- __asm__ __volatile__ ("stha %0, [%1] %2" : :
- "r" (clear),
- "r" (CC_ICLR),
- "i" (ASI_M_MXCC));
-}
-
-static inline unsigned int cc_get_imsk(void)
-{
- unsigned int mask;
-
- __asm__ __volatile__ ("lduha [%1] %2, %0" :
- "=r" (mask) :
- "r" (CC_IMSK),
- "i" (ASI_M_MXCC));
- return mask;
-}
-
-static inline void cc_set_imsk(unsigned int mask)
-{
- __asm__ __volatile__ ("stha %0, [%1] %2" : :
- "r" (mask),
- "r" (CC_IMSK),
- "i" (ASI_M_MXCC));
-}
-
-static inline unsigned int cc_get_imsk_other(int cpuid)
-{
- unsigned int mask;
-
- __asm__ __volatile__ ("lduha [%1] %2, %0" :
- "=r" (mask) :
- "r" (ECSR_BASE(cpuid) | CC_IMSK),
- "i" (ASI_M_CTL));
- return mask;
-}
-
-static inline void cc_set_imsk_other(int cpuid, unsigned int mask)
-{
- __asm__ __volatile__ ("stha %0, [%1] %2" : :
- "r" (mask),
- "r" (ECSR_BASE(cpuid) | CC_IMSK),
- "i" (ASI_M_CTL));
-}
-
-static inline void cc_set_igen(unsigned int gen)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (gen),
- "r" (CC_IGEN),
- "i" (ASI_M_MXCC));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* !(_SPARC_OBIO_H) */
diff --git a/arch/sparc/include/asm/sbi.h b/arch/sparc/include/asm/sbi.h
deleted file mode 100644
index 4d6026c1e446..000000000000
--- a/arch/sparc/include/asm/sbi.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * sbi.h: SBI (Sbus Interface on sun4d) definitions
- *
- * Copyright (C) 1997 Jakub Jelinek <jj@xxxxxxxxxxxxxxxxxxx>
- */
-
-#ifndef _SPARC_SBI_H
-#define _SPARC_SBI_H
-
-#include <asm/obio.h>
-
-/* SBI */
-struct sbi_regs {
-/* 0x0000 */ u32 cid; /* Component ID */
-/* 0x0004 */ u32 ctl; /* Control */
-/* 0x0008 */ u32 status; /* Status */
- u32 _unused1;
-
-/* 0x0010 */ u32 cfg0; /* Slot0 config reg */
-/* 0x0014 */ u32 cfg1; /* Slot1 config reg */
-/* 0x0018 */ u32 cfg2; /* Slot2 config reg */
-/* 0x001c */ u32 cfg3; /* Slot3 config reg */
-
-/* 0x0020 */ u32 stb0; /* Streaming buf control for slot 0 */
-/* 0x0024 */ u32 stb1; /* Streaming buf control for slot 1 */
-/* 0x0028 */ u32 stb2; /* Streaming buf control for slot 2 */
-/* 0x002c */ u32 stb3; /* Streaming buf control for slot 3 */
-
-/* 0x0030 */ u32 intr_state; /* Interrupt state */
-/* 0x0034 */ u32 intr_tid; /* Interrupt target ID */
-/* 0x0038 */ u32 intr_diag; /* Interrupt diagnostics */
-};
-
-#define SBI_CID 0x02800000
-#define SBI_CTL 0x02800004
-#define SBI_STATUS 0x02800008
-#define SBI_CFG0 0x02800010
-#define SBI_CFG1 0x02800014
-#define SBI_CFG2 0x02800018
-#define SBI_CFG3 0x0280001c
-#define SBI_STB0 0x02800020
-#define SBI_STB1 0x02800024
-#define SBI_STB2 0x02800028
-#define SBI_STB3 0x0280002c
-#define SBI_INTR_STATE 0x02800030
-#define SBI_INTR_TID 0x02800034
-#define SBI_INTR_DIAG 0x02800038
-
-/* Burst bits for 8, 16, 32, 64 are in cfgX registers at bits 2, 3, 4, 5 respectively */
-#define SBI_CFG_BURST_MASK 0x0000001e
-
-/* How to make devid from sbi no */
-#define SBI2DEVID(sbino) ((sbino<<4)|2)
-
-/* intr_state has 4 bits for slots 0 .. 3 and these bits are repeated for each sbus irq level
- *
- * +-------+-------+-------+-------+-------+-------+-------+-------+
- * SBUS IRQ LEVEL | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Reser |
- * SLOT # |3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0|3|2|1|0| ved |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------+
- * Bits 31 27 23 19 15 11 7 3 0
- */
-
-
-#ifndef __ASSEMBLY__
-
-static inline int acquire_sbi(int devid, int mask)
-{
- __asm__ __volatile__ ("swapa [%2] %3, %0" :
- "=r" (mask) :
- "0" (mask),
- "r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
- "i" (ASI_M_CTL));
- return mask;
-}
-
-static inline void release_sbi(int devid, int mask)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (mask),
- "r" (ECSR_DEV_BASE(devid) | SBI_INTR_STATE),
- "i" (ASI_M_CTL));
-}
-
-static inline void set_sbi_tid(int devid, int targetid)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (targetid),
- "r" (ECSR_DEV_BASE(devid) | SBI_INTR_TID),
- "i" (ASI_M_CTL));
-}
-
-static inline int get_sbi_ctl(int devid, int cfgno)
-{
- int cfg;
-
- __asm__ __volatile__ ("lda [%1] %2, %0" :
- "=r" (cfg) :
- "r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
- "i" (ASI_M_CTL));
- return cfg;
-}
-
-static inline void set_sbi_ctl(int devid, int cfgno, int cfg)
-{
- __asm__ __volatile__ ("sta %0, [%1] %2" : :
- "r" (cfg),
- "r" ((ECSR_DEV_BASE(devid) | SBI_CFG0) + (cfgno<<2)),
- "i" (ASI_M_CTL));
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif /* !(_SPARC_SBI_H) */
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index ea51a17ac3fc..bbbf30c60f1c 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -24,7 +24,6 @@
#include <asm/page.h>
#include <asm/winmacro.h>
#include <asm/signal.h>
-#include <asm/obio.h>
#include <asm/thread_info.h>
#include <asm/param.h>
#include <asm/unistd.h>
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index cf0ace29704a..745579a40785 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -49,7 +49,6 @@
#include <asm/pgalloc.h>
#include <asm/dma.h>
#include <asm/iommu.h>
-#include <asm/io-unit.h>
#include <asm/leon.h>
static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
diff --git a/arch/sparc/mm/Makefile b/arch/sparc/mm/Makefile
index f0560eea2958..f8a897e24438 100644
--- a/arch/sparc/mm/Makefile
+++ b/arch/sparc/mm/Makefile
@@ -7,7 +7,7 @@ asflags-y := -ansi
obj-$(CONFIG_SPARC64) += ultra.o tlb.o tsb.o
obj-y += fault_$(BITS).o
obj-y += init_$(BITS).o
-obj-$(CONFIG_SPARC32) += srmmu.o iommu.o io-unit.o
+obj-$(CONFIG_SPARC32) += srmmu.o iommu.o
obj-$(CONFIG_SPARC32) += leon_mm.o
# Only used by sparc64
diff --git a/arch/sparc/mm/io-unit.c b/arch/sparc/mm/io-unit.c
deleted file mode 100644
index a2cfa8757795..000000000000
--- a/arch/sparc/mm/io-unit.c
+++ /dev/null
@@ -1,283 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * io-unit.c: IO-UNIT specific routines for memory management.
- *
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@xxxxxxxxxxxxxxxxxxx)
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
-#include <linux/bitops.h>
-#include <linux/dma-map-ops.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-
-#include <asm/io.h>
-#include <asm/io-unit.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-#include <asm/dma.h>
-#include <asm/oplib.h>
-
-#include "mm_32.h"
-
-/* #define IOUNIT_DEBUG */
-#ifdef IOUNIT_DEBUG
-#define IOD(x) printk(x)
-#else
-#define IOD(x) do { } while (0)
-#endif
-
-#define IOPERM (IOUPTE_CACHE | IOUPTE_WRITE | IOUPTE_VALID)
-#define MKIOPTE(phys) __iopte((((phys)>>4) & IOUPTE_PAGE) | IOPERM)
-
-static const struct dma_map_ops iounit_dma_ops;
-
-static void __init iounit_iommu_init(struct platform_device *op)
-{
- struct iounit_struct *iounit;
- iopte_t __iomem *xpt;
- iopte_t __iomem *xptend;
-
- iounit = kzalloc(sizeof(struct iounit_struct), GFP_ATOMIC);
- if (!iounit) {
- prom_printf("SUN4D: Cannot alloc iounit, halting.\n");
- prom_halt();
- }
-
- iounit->limit[0] = IOUNIT_BMAP1_START;
- iounit->limit[1] = IOUNIT_BMAP2_START;
- iounit->limit[2] = IOUNIT_BMAPM_START;
- iounit->limit[3] = IOUNIT_BMAPM_END;
- iounit->rotor[1] = IOUNIT_BMAP2_START;
- iounit->rotor[2] = IOUNIT_BMAPM_START;
-
- xpt = of_ioremap(&op->resource[2], 0, PAGE_SIZE * 16, "XPT");
- if (!xpt) {
- prom_printf("SUN4D: Cannot map External Page Table.");
- prom_halt();
- }
-
- op->dev.archdata.iommu = iounit;
- iounit->page_table = xpt;
- spin_lock_init(&iounit->lock);
-
- xptend = iounit->page_table + (16 * PAGE_SIZE) / sizeof(iopte_t);
- for (; xpt < xptend; xpt++)
- sbus_writel(0, xpt);
-
- op->dev.dma_ops = &iounit_dma_ops;
-}
-
-static int __init iounit_init(void)
-{
- extern void sun4d_init_sbi_irq(void);
- struct device_node *dp;
-
- for_each_node_by_name(dp, "sbi") {
- struct platform_device *op = of_find_device_by_node(dp);
-
- iounit_iommu_init(op);
- of_propagate_archdata(op);
- }
-
- return 0;
-}
-
-subsys_initcall(iounit_init);
-
-/* One has to hold iounit->lock to call this */
-static unsigned long iounit_get_area(struct iounit_struct *iounit, unsigned long vaddr, int size)
-{
- int i, j, k, npages;
- unsigned long rotor, scan, limit;
- iopte_t iopte;
-
- npages = ((vaddr & ~PAGE_MASK) + size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
-
- /* A tiny bit of magic ingredience :) */
- switch (npages) {
- case 1: i = 0x0231; break;
- case 2: i = 0x0132; break;
- default: i = 0x0213; break;
- }
-
- IOD(("iounit_get_area(%08lx,%d[%d])=", vaddr, size, npages));
-
-next: j = (i & 15);
- rotor = iounit->rotor[j - 1];
- limit = iounit->limit[j];
- scan = rotor;
-nexti: scan = find_next_zero_bit(iounit->bmap, limit, scan);
- if (scan + npages > limit) {
- if (limit != rotor) {
- limit = rotor;
- scan = iounit->limit[j - 1];
- goto nexti;
- }
- i >>= 4;
- if (!(i & 15))
- panic("iounit_get_area: Couldn't find free iopte slots for (%08lx,%d)\n", vaddr, size);
- goto next;
- }
- for (k = 1, scan++; k < npages; k++)
- if (test_bit(scan++, iounit->bmap))
- goto nexti;
- iounit->rotor[j - 1] = (scan < limit) ? scan : iounit->limit[j - 1];
- scan -= npages;
- iopte = MKIOPTE(__pa(vaddr & PAGE_MASK));
- vaddr = IOUNIT_DMA_BASE + (scan << PAGE_SHIFT) + (vaddr & ~PAGE_MASK);
- for (k = 0; k < npages; k++, iopte = __iopte(iopte_val(iopte) + 0x100), scan++) {
- set_bit(scan, iounit->bmap);
- sbus_writel(iopte_val(iopte), &iounit->page_table[scan]);
- }
- IOD(("%08lx\n", vaddr));
- return vaddr;
-}
-
-static dma_addr_t iounit_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t len, enum dma_data_direction dir,
- unsigned long attrs)
-{
- void *vaddr = page_address(page) + offset;
- struct iounit_struct *iounit = dev->archdata.iommu;
- unsigned long ret, flags;
-
- /* XXX So what is maxphys for us and how do drivers know it? */
- if (!len || len > 256 * 1024)
- return DMA_MAPPING_ERROR;
-
- spin_lock_irqsave(&iounit->lock, flags);
- ret = iounit_get_area(iounit, (unsigned long)vaddr, len);
- spin_unlock_irqrestore(&iounit->lock, flags);
- return ret;
-}
-
-static int iounit_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
- enum dma_data_direction dir, unsigned long attrs)
-{
- struct iounit_struct *iounit = dev->archdata.iommu;
- struct scatterlist *sg;
- unsigned long flags;
- int i;
-
- /* FIXME: Cache some resolved pages - often several sg entries are to the same page */
- spin_lock_irqsave(&iounit->lock, flags);
- for_each_sg(sgl, sg, nents, i) {
- sg->dma_address = iounit_get_area(iounit, (unsigned long) sg_virt(sg), sg->length);
- sg->dma_length = sg->length;
- }
- spin_unlock_irqrestore(&iounit->lock, flags);
- return nents;
-}
-
-static void iounit_unmap_page(struct device *dev, dma_addr_t vaddr, size_t len,
- enum dma_data_direction dir, unsigned long attrs)
-{
- struct iounit_struct *iounit = dev->archdata.iommu;
- unsigned long flags;
-
- spin_lock_irqsave(&iounit->lock, flags);
- len = ((vaddr & ~PAGE_MASK) + len + (PAGE_SIZE-1)) >> PAGE_SHIFT;
- vaddr = (vaddr - IOUNIT_DMA_BASE) >> PAGE_SHIFT;
- IOD(("iounit_release %08lx-%08lx\n", (long)vaddr, (long)len+vaddr));
- for (len += vaddr; vaddr < len; vaddr++)
- clear_bit(vaddr, iounit->bmap);
- spin_unlock_irqrestore(&iounit->lock, flags);
-}
-
-static void iounit_unmap_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir, unsigned long attrs)
-{
- struct iounit_struct *iounit = dev->archdata.iommu;
- unsigned long flags, vaddr, len;
- struct scatterlist *sg;
- int i;
-
- spin_lock_irqsave(&iounit->lock, flags);
- for_each_sg(sgl, sg, nents, i) {
- len = ((sg->dma_address & ~PAGE_MASK) + sg->length + (PAGE_SIZE-1)) >> PAGE_SHIFT;
- vaddr = (sg->dma_address - IOUNIT_DMA_BASE) >> PAGE_SHIFT;
- IOD(("iounit_release %08lx-%08lx\n", (long)vaddr, (long)len+vaddr));
- for (len += vaddr; vaddr < len; vaddr++)
- clear_bit(vaddr, iounit->bmap);
- }
- spin_unlock_irqrestore(&iounit->lock, flags);
-}
-
-#ifdef CONFIG_SBUS
-static void *iounit_alloc(struct device *dev, size_t len,
- dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
-{
- struct iounit_struct *iounit = dev->archdata.iommu;
- unsigned long va, addr, page, end, ret;
- pgprot_t dvma_prot;
- iopte_t __iomem *iopte;
-
- /* XXX So what is maxphys for us and how do drivers know it? */
- if (!len || len > 256 * 1024)
- return NULL;
-
- len = PAGE_ALIGN(len);
- va = __get_free_pages(gfp | __GFP_ZERO, get_order(len));
- if (!va)
- return NULL;
-
- addr = ret = sparc_dma_alloc_resource(dev, len);
- if (!addr)
- goto out_free_pages;
- *dma_handle = addr;
-
- dvma_prot = __pgprot(SRMMU_CACHE | SRMMU_ET_PTE | SRMMU_PRIV);
- end = PAGE_ALIGN((addr + len));
- while(addr < end) {
- page = va;
- {
- pmd_t *pmdp;
- pte_t *ptep;
- long i;
-
- pmdp = pmd_off_k(addr);
- ptep = pte_offset_kernel(pmdp, addr);
-
- set_pte(ptep, mk_pte(virt_to_page(page), dvma_prot));
-
- i = ((addr - IOUNIT_DMA_BASE) >> PAGE_SHIFT);
-
- iopte = iounit->page_table + i;
- sbus_writel(iopte_val(MKIOPTE(__pa(page))), iopte);
- }
- addr += PAGE_SIZE;
- va += PAGE_SIZE;
- }
- flush_cache_all();
- flush_tlb_all();
-
- return (void *)ret;
-
-out_free_pages:
- free_pages(va, get_order(len));
- return NULL;
-}
-
-static void iounit_free(struct device *dev, size_t size, void *cpu_addr,
- dma_addr_t dma_addr, unsigned long attrs)
-{
- /* XXX Somebody please fill this in */
-}
-#endif
-
-static const struct dma_map_ops iounit_dma_ops = {
-#ifdef CONFIG_SBUS
- .alloc = iounit_alloc,
- .free = iounit_free,
-#endif
- .map_page = iounit_map_page,
- .unmap_page = iounit_unmap_page,
- .map_sg = iounit_map_sg,
- .unmap_sg = iounit_unmap_sg,
-};
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 4a3778549c6f..949247a6896b 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -26,7 +26,6 @@
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
-#include <asm/io-unit.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/bitext.h>
--
2.34.1