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m68knommu: changes for linux 5.19

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. correctly set up ZERO_PAGE pointer
 . drop ISA_DMA_API support
 . fix comment typos
 . fixes for undefined symbols
 . remove unused code and variables
 . elf-fdpic loader support for m68k
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Merge tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

Pull m68knommu updates from Greg Ungerer:
 "A collection of changes to add elf-fdpic loader support for m68k.

  Also a collection of various fixes. They include typo corrections,
  undefined symbol compilation fixes, removal of the ISA_DMA_API support
  and removal of unused code.

  Summary:

   - correctly set up ZERO_PAGE pointer

   - drop ISA_DMA_API support

   - fix comment typos

   - fixes for undefined symbols

   - remove unused code and variables

   - elf-fdpic loader support for m68k"

* tag 'm68knommu-for-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: fix 68000 CPU link with no platform selected
  m68k: removed unused "mach_get_ss"
  m68knommu: fix undefined reference to `mach_get_rtc_pll'
  m68knommu: fix undefined reference to `_init_sp'
  m68knommu: allow elf_fdpic loader to be selected
  m68knommu: add definitions to support elf_fdpic program loader
  m68knommu: implement minimal regset support
  m68knommu: use asm-generic/mmu.h for nommu setups
  m68k: fix typos in comments
  m68k: coldfire: drop ISA_DMA_API support
  m68knommu: set ZERO_PAGE() to the allocated zeroed page
This commit is contained in:
Linus Torvalds 2022-05-30 10:56:18 -07:00
commit 2d2da475ac
25 changed files with 93 additions and 576 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/m68k/Kconfig.bus
View File

@ -56,16 +56,6 @@ config ATARI_ROM_ISA
The only driver currently using this adapter is the EtherNEC
driver for RTL8019AS based NE2000 compatible network cards.
config GENERIC_ISA_DMA
def_bool ISA
source "drivers/zorro/Kconfig"
endif
if COLDFIRE
config ISA_DMA_API
def_bool !M5272
endif

2
arch/m68k/Kconfig.cpu
View File

@ -37,7 +37,7 @@ endchoice
if M68KCLASSIC
config M68000
bool
def_bool y
depends on !MMU
select CPU_HAS_NO_BITFIELDS
select CPU_HAS_NO_CAS

1
arch/m68k/Kconfig.machine
View File

@ -352,6 +352,7 @@ comment "Machine Options"
config UBOOT
bool "Support for U-Boot command line parameters"
depends on COLDFIRE
help
If you say Y here kernel will try to collect command
line parameters from the initial u-boot stack.

2
arch/m68k/coldfire/Makefile
View File

@ -15,7 +15,7 @@
asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
obj-$(CONFIG_COLDFIRE) += cache.o clk.o device.o dma.o entry.o vectors.o
obj-$(CONFIG_COLDFIRE) += cache.o clk.o device.o entry.o vectors.o
obj-$(CONFIG_M5206) += m5206.o intc.o reset.o
obj-$(CONFIG_M5206e) += m5206.o intc.o reset.o
obj-$(CONFIG_M520x) += m520x.o intc-simr.o reset.o

43
arch/m68k/coldfire/dma.c
View File

@ -1,43 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/***************************************************************************/
/*
* dma.c -- Freescale ColdFire DMA support
*
* Copyright (C) 2007, Greg Ungerer (gerg@snapgear.com)
*/
/***************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/dma.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfdma.h>
/***************************************************************************/
/*
* DMA channel base address table.
*/
unsigned int dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
#ifdef MCFDMA_BASE0
MCFDMA_BASE0,
#endif
#ifdef MCFDMA_BASE1
MCFDMA_BASE1,
#endif
#ifdef MCFDMA_BASE2
MCFDMA_BASE2,
#endif
#ifdef MCFDMA_BASE3
MCFDMA_BASE3,
#endif
};
EXPORT_SYMBOL(dma_base_addr);
unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
EXPORT_SYMBOL(dma_device_address);
/***************************************************************************/

2
arch/m68k/coldfire/intc.c
View File

@ -28,7 +28,7 @@
unsigned char mcf_irq2imr[NR_IRQS];
/*
* Define the miniumun and maximum external interrupt numbers.
* Define the minimum and maximum external interrupt numbers.
* This is also used as the "level" interrupt numbers.
*/
#define EIRQ1 25

2
arch/m68k/coldfire/m53xx.c
View File

@ -532,7 +532,7 @@ int clock_pll(int fsys, int flags)
writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_CKE,
MCF_SDRAMC_SDCR);
/* Errata - workaround for SDRAM opeartion after exiting LIMP mode */
/* Errata - workaround for SDRAM operation after exiting LIMP mode */
writel(MCF_SDRAMC_REFRESH, MCF_SDRAMC_LIMP_FIX);
/* wait for DQS logic to relock */

2
arch/m68k/coldfire/pci.c
View File

@ -31,7 +31,7 @@ static struct pci_bus *rootbus;
static unsigned long iospace;
/*
* We need to be carefull probing on bus 0 (directly connected to host
* We need to be careful probing on bus 0 (directly connected to host
* bridge). We should only access the well defined possible devices in
* use, ignore aliases and the like.
*/

7
arch/m68k/hp300/config.c
View File

@ -240,12 +240,6 @@ static int hp300_hwclk(int op, struct rtc_time *t)
return 0;
}
static unsigned int hp300_get_ss(void)
{
return hp300_rtc_read(RTC_REG_SEC1) * 10 +
hp300_rtc_read(RTC_REG_SEC2);
}
static void __init hp300_init_IRQ(void)
{
}
@ -256,7 +250,6 @@ void __init config_hp300(void)
mach_init_IRQ = hp300_init_IRQ;
mach_get_model = hp300_get_model;
mach_hwclk = hp300_hwclk;
mach_get_ss = hp300_get_ss;
mach_reset = hp300_reset;
#ifdef CONFIG_HEARTBEAT
mach_heartbeat = hp300_pulse;

483
arch/m68k/include/asm/dma.h
View File

@ -2,493 +2,10 @@
#ifndef _M68K_DMA_H
#define _M68K_DMA_H 1
#ifdef CONFIG_COLDFIRE
/*
* ColdFire DMA Model:
* ColdFire DMA supports two forms of DMA: Single and Dual address. Single
* address mode emits a source address, and expects that the device will either
* pick up the data (DMA READ) or source data (DMA WRITE). This implies that
* the device will place data on the correct byte(s) of the data bus, as the
* memory transactions are always 32 bits. This implies that only 32 bit
* devices will find single mode transfers useful. Dual address DMA mode
* performs two cycles: source read and destination write. ColdFire will
* align the data so that the device will always get the correct bytes, thus
* is useful for 8 and 16 bit devices. This is the mode that is supported
* below.
*
* AUG/22/2000 : added support for 32-bit Dual-Address-Mode (K) 2000
* Oliver Kamphenkel (O.Kamphenkel@tu-bs.de)
*
* AUG/25/2000 : added support for 8, 16 and 32-bit Single-Address-Mode (K)2000
* Oliver Kamphenkel (O.Kamphenkel@tu-bs.de)
*
* APR/18/2002 : added proper support for MCF5272 DMA controller.
* Arthur Shipkowski (art@videon-central.com)
*/
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfdma.h>
/*
* Set number of channels of DMA on ColdFire for different implementations.
*/
#if defined(CONFIG_M5249) || defined(CONFIG_M5307) || defined(CONFIG_M5407) || \
defined(CONFIG_M523x) || defined(CONFIG_M527x) || \
defined(CONFIG_M528x) || defined(CONFIG_M525x)
#define MAX_M68K_DMA_CHANNELS 4
#elif defined(CONFIG_M5272)
#define MAX_M68K_DMA_CHANNELS 1
#elif defined(CONFIG_M53xx)
#define MAX_M68K_DMA_CHANNELS 0
#else
#define MAX_M68K_DMA_CHANNELS 2
#endif
extern unsigned int dma_base_addr[MAX_M68K_DMA_CHANNELS];
extern unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
#if !defined(CONFIG_M5272)
#define DMA_MODE_WRITE_BIT 0x01 /* Memory/IO to IO/Memory select */
#define DMA_MODE_WORD_BIT 0x02 /* 8 or 16 bit transfers */
#define DMA_MODE_LONG_BIT 0x04 /* or 32 bit transfers */
#define DMA_MODE_SINGLE_BIT 0x08 /* single-address-mode */
/* I/O to memory, 8 bits, mode */
#define DMA_MODE_READ 0
/* memory to I/O, 8 bits, mode */
#define DMA_MODE_WRITE 1
/* I/O to memory, 16 bits, mode */
#define DMA_MODE_READ_WORD 2
/* memory to I/O, 16 bits, mode */
#define DMA_MODE_WRITE_WORD 3
/* I/O to memory, 32 bits, mode */
#define DMA_MODE_READ_LONG 4
/* memory to I/O, 32 bits, mode */
#define DMA_MODE_WRITE_LONG 5
/* I/O to memory, 8 bits, single-address-mode */
#define DMA_MODE_READ_SINGLE 8
/* memory to I/O, 8 bits, single-address-mode */
#define DMA_MODE_WRITE_SINGLE 9
/* I/O to memory, 16 bits, single-address-mode */
#define DMA_MODE_READ_WORD_SINGLE 10
/* memory to I/O, 16 bits, single-address-mode */
#define DMA_MODE_WRITE_WORD_SINGLE 11
/* I/O to memory, 32 bits, single-address-mode */
#define DMA_MODE_READ_LONG_SINGLE 12
/* memory to I/O, 32 bits, single-address-mode */
#define DMA_MODE_WRITE_LONG_SINGLE 13
#else /* CONFIG_M5272 is defined */
/* Source static-address mode */
#define DMA_MODE_SRC_SA_BIT 0x01
/* Two bits to select between all four modes */
#define DMA_MODE_SSIZE_MASK 0x06
/* Offset to shift bits in */
#define DMA_MODE_SSIZE_OFF 0x01
/* Destination static-address mode */
#define DMA_MODE_DES_SA_BIT 0x10
/* Two bits to select between all four modes */
#define DMA_MODE_DSIZE_MASK 0x60
/* Offset to shift bits in */
#define DMA_MODE_DSIZE_OFF 0x05
/* Size modifiers */
#define DMA_MODE_SIZE_LONG 0x00
#define DMA_MODE_SIZE_BYTE 0x01
#define DMA_MODE_SIZE_WORD 0x02
#define DMA_MODE_SIZE_LINE 0x03
/*
* Aliases to help speed quick ports; these may be suboptimal, however. They
* do not include the SINGLE mode modifiers since the MCF5272 does not have a
* mode where the device is in control of its addressing.
*/
/* I/O to memory, 8 bits, mode */
#define DMA_MODE_READ ((DMA_MODE_SIZE_BYTE << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_BYTE << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
/* memory to I/O, 8 bits, mode */
#define DMA_MODE_WRITE ((DMA_MODE_SIZE_BYTE << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_BYTE << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
/* I/O to memory, 16 bits, mode */
#define DMA_MODE_READ_WORD ((DMA_MODE_SIZE_WORD << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_WORD << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
/* memory to I/O, 16 bits, mode */
#define DMA_MODE_WRITE_WORD ((DMA_MODE_SIZE_WORD << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_WORD << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
/* I/O to memory, 32 bits, mode */
#define DMA_MODE_READ_LONG ((DMA_MODE_SIZE_LONG << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_LONG << DMA_MODE_SSIZE_OFF) | DMA_SRC_SA_BIT)
/* memory to I/O, 32 bits, mode */
#define DMA_MODE_WRITE_LONG ((DMA_MODE_SIZE_LONG << DMA_MODE_DSIZE_OFF) | (DMA_MODE_SIZE_LONG << DMA_MODE_SSIZE_OFF) | DMA_DES_SA_BIT)
#endif /* !defined(CONFIG_M5272) */
#if !defined(CONFIG_M5272)
/* enable/disable a specific DMA channel */
static __inline__ void enable_dma(unsigned int dmanr)
{
volatile unsigned short *dmawp;
#ifdef DMA_DEBUG
printk("enable_dma(dmanr=%d)\n", dmanr);
#endif
dmawp = (unsigned short *) dma_base_addr[dmanr];
dmawp[MCFDMA_DCR] |= MCFDMA_DCR_EEXT;
}
static __inline__ void disable_dma(unsigned int dmanr)
{
volatile unsigned short *dmawp;
volatile unsigned char *dmapb;
#ifdef DMA_DEBUG
printk("disable_dma(dmanr=%d)\n", dmanr);
#endif
dmawp = (unsigned short *) dma_base_addr[dmanr];
dmapb = (unsigned char *) dma_base_addr[dmanr];
/* Turn off external requests, and stop any DMA in progress */
dmawp[MCFDMA_DCR] &= ~MCFDMA_DCR_EEXT;
dmapb[MCFDMA_DSR] = MCFDMA_DSR_DONE;
}
/*
* Clear the 'DMA Pointer Flip Flop'.
* Write 0 for LSB/MSB, 1 for MSB/LSB access.
* Use this once to initialize the FF to a known state.
* After that, keep track of it. :-)
* --- In order to do that, the DMA routines below should ---
* --- only be used while interrupts are disabled! ---
*
* This is a NOP for ColdFire. Provide a stub for compatibility.
*/
static __inline__ void clear_dma_ff(unsigned int dmanr)
{
}
/* set mode (above) for a specific DMA channel */
static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
{
volatile unsigned char *dmabp;
volatile unsigned short *dmawp;
#ifdef DMA_DEBUG
printk("set_dma_mode(dmanr=%d,mode=%d)\n", dmanr, mode);
#endif
dmabp = (unsigned char *) dma_base_addr[dmanr];
dmawp = (unsigned short *) dma_base_addr[dmanr];
/* Clear config errors */
dmabp[MCFDMA_DSR] = MCFDMA_DSR_DONE;
/* Set command register */
dmawp[MCFDMA_DCR] =
MCFDMA_DCR_INT | /* Enable completion irq */
MCFDMA_DCR_CS | /* Force one xfer per request */
MCFDMA_DCR_AA | /* Enable auto alignment */
/* single-address-mode */
((mode & DMA_MODE_SINGLE_BIT) ? MCFDMA_DCR_SAA : 0) |
/* sets s_rw (-> r/w) high if Memory to I/0 */
((mode & DMA_MODE_WRITE_BIT) ? MCFDMA_DCR_S_RW : 0) |
/* Memory to I/O or I/O to Memory */
((mode & DMA_MODE_WRITE_BIT) ? MCFDMA_DCR_SINC : MCFDMA_DCR_DINC) |
/* 32 bit, 16 bit or 8 bit transfers */
((mode & DMA_MODE_WORD_BIT) ? MCFDMA_DCR_SSIZE_WORD :
((mode & DMA_MODE_LONG_BIT) ? MCFDMA_DCR_SSIZE_LONG :
MCFDMA_DCR_SSIZE_BYTE)) |
((mode & DMA_MODE_WORD_BIT) ? MCFDMA_DCR_DSIZE_WORD :
((mode & DMA_MODE_LONG_BIT) ? MCFDMA_DCR_DSIZE_LONG :
MCFDMA_DCR_DSIZE_BYTE));
#ifdef DEBUG_DMA
printk("%s(%d): dmanr=%d DSR[%x]=%x DCR[%x]=%x\n", __FILE__, __LINE__,
dmanr, (int) &dmabp[MCFDMA_DSR], dmabp[MCFDMA_DSR],
(int) &dmawp[MCFDMA_DCR], dmawp[MCFDMA_DCR]);
#endif
}
/* Set transfer address for specific DMA channel */
static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)
{
volatile unsigned short *dmawp;
volatile unsigned int *dmalp;
#ifdef DMA_DEBUG
printk("set_dma_addr(dmanr=%d,a=%x)\n", dmanr, a);
#endif
dmawp = (unsigned short *) dma_base_addr[dmanr];
dmalp = (unsigned int *) dma_base_addr[dmanr];
/* Determine which address registers are used for memory/device accesses */
if (dmawp[MCFDMA_DCR] & MCFDMA_DCR_SINC) {
/* Source incrementing, must be memory */
dmalp[MCFDMA_SAR] = a;
/* Set dest address, must be device */
dmalp[MCFDMA_DAR] = dma_device_address[dmanr];
} else {
/* Destination incrementing, must be memory */
dmalp[MCFDMA_DAR] = a;
/* Set source address, must be device */
dmalp[MCFDMA_SAR] = dma_device_address[dmanr];
}
#ifdef DEBUG_DMA
printk("%s(%d): dmanr=%d DCR[%x]=%x SAR[%x]=%08x DAR[%x]=%08x\n",
__FILE__, __LINE__, dmanr, (int) &dmawp[MCFDMA_DCR], dmawp[MCFDMA_DCR],
(int) &dmalp[MCFDMA_SAR], dmalp[MCFDMA_SAR],
(int) &dmalp[MCFDMA_DAR], dmalp[MCFDMA_DAR]);
#endif
}
/*
* Specific for Coldfire - sets device address.
* Should be called after the mode set call, and before set DMA address.
*/
static __inline__ void set_dma_device_addr(unsigned int dmanr, unsigned int a)
{
#ifdef DMA_DEBUG
printk("set_dma_device_addr(dmanr=%d,a=%x)\n", dmanr, a);
#endif
dma_device_address[dmanr] = a;
}
/*
* NOTE 2: "count" represents _bytes_.
*/
static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
{
volatile unsigned short *dmawp;
#ifdef DMA_DEBUG
printk("set_dma_count(dmanr=%d,count=%d)\n", dmanr, count);
#endif
dmawp = (unsigned short *) dma_base_addr[dmanr];
dmawp[MCFDMA_BCR] = (unsigned short)count;
}
/*
* Get DMA residue count. After a DMA transfer, this
* should return zero. Reading this while a DMA transfer is
* still in progress will return unpredictable results.
* Otherwise, it returns the number of _bytes_ left to transfer.
*/
static __inline__ int get_dma_residue(unsigned int dmanr)
{
volatile unsigned short *dmawp;
unsigned short count;
#ifdef DMA_DEBUG
printk("get_dma_residue(dmanr=%d)\n", dmanr);
#endif
dmawp = (unsigned short *) dma_base_addr[dmanr];
count = dmawp[MCFDMA_BCR];
return((int) count);
}
#else /* CONFIG_M5272 is defined */
/*
* The MCF5272 DMA controller is very different than the controller defined above
* in terms of register mapping. For instance, with the exception of the 16-bit
* interrupt register (IRQ#85, for reference), all of the registers are 32-bit.
*
* The big difference, however, is the lack of device-requested DMA. All modes
* are dual address transfer, and there is no 'device' setup or direction bit.
* You can DMA between a device and memory, between memory and memory, or even between
* two devices directly, with any combination of incrementing and non-incrementing
* addresses you choose. This puts a crimp in distinguishing between the 'device
* address' set up by set_dma_device_addr.
*
* Therefore, there are two options. One is to use set_dma_addr and set_dma_device_addr,
* which will act exactly as above in -- it will look to see if the source is set to
* autoincrement, and if so it will make the source use the set_dma_addr value and the
* destination the set_dma_device_addr value. Otherwise the source will be set to the
* set_dma_device_addr value and the destination will get the set_dma_addr value.
*
* The other is to use the provided set_dma_src_addr and set_dma_dest_addr functions
* and make it explicit. Depending on what you're doing, one of these two should work
* for you, but don't mix them in the same transfer setup.
*/
/* enable/disable a specific DMA channel */
static __inline__ void enable_dma(unsigned int dmanr)
{
volatile unsigned int *dmalp;
#ifdef DMA_DEBUG
printk("enable_dma(dmanr=%d)\n", dmanr);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
dmalp[MCFDMA_DMR] |= MCFDMA_DMR_EN;
}
static __inline__ void disable_dma(unsigned int dmanr)
{
volatile unsigned int *dmalp;
#ifdef DMA_DEBUG
printk("disable_dma(dmanr=%d)\n", dmanr);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
/* Turn off external requests, and stop any DMA in progress */
dmalp[MCFDMA_DMR] &= ~MCFDMA_DMR_EN;
dmalp[MCFDMA_DMR] |= MCFDMA_DMR_RESET;
}
/*
* Clear the 'DMA Pointer Flip Flop'.
* Write 0 for LSB/MSB, 1 for MSB/LSB access.
* Use this once to initialize the FF to a known state.
* After that, keep track of it. :-)
* --- In order to do that, the DMA routines below should ---
* --- only be used while interrupts are disabled! ---
*
* This is a NOP for ColdFire. Provide a stub for compatibility.
*/
static __inline__ void clear_dma_ff(unsigned int dmanr)
{
}
/* set mode (above) for a specific DMA channel */
static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
{
volatile unsigned int *dmalp;
volatile unsigned short *dmawp;
#ifdef DMA_DEBUG
printk("set_dma_mode(dmanr=%d,mode=%d)\n", dmanr, mode);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
dmawp = (unsigned short *) dma_base_addr[dmanr];
/* Clear config errors */
dmalp[MCFDMA_DMR] |= MCFDMA_DMR_RESET;
/* Set command register */
dmalp[MCFDMA_DMR] =
MCFDMA_DMR_RQM_DUAL | /* Mandatory Request Mode setting */
MCFDMA_DMR_DSTT_SD | /* Set up addressing types; set to supervisor-data. */
MCFDMA_DMR_SRCT_SD | /* Set up addressing types; set to supervisor-data. */
/* source static-address-mode */
((mode & DMA_MODE_SRC_SA_BIT) ? MCFDMA_DMR_SRCM_SA : MCFDMA_DMR_SRCM_IA) |
/* dest static-address-mode */
((mode & DMA_MODE_DES_SA_BIT) ? MCFDMA_DMR_DSTM_SA : MCFDMA_DMR_DSTM_IA) |
/* burst, 32 bit, 16 bit or 8 bit transfers are separately configurable on the MCF5272 */
(((mode & DMA_MODE_SSIZE_MASK) >> DMA_MODE_SSIZE_OFF) << MCFDMA_DMR_DSTS_OFF) |
(((mode & DMA_MODE_SSIZE_MASK) >> DMA_MODE_SSIZE_OFF) << MCFDMA_DMR_SRCS_OFF);
dmawp[MCFDMA_DIR] |= MCFDMA_DIR_ASCEN; /* Enable completion interrupts */
#ifdef DEBUG_DMA
printk("%s(%d): dmanr=%d DMR[%x]=%x DIR[%x]=%x\n", __FILE__, __LINE__,
dmanr, (int) &dmalp[MCFDMA_DMR], dmalp[MCFDMA_DMR],
(int) &dmawp[MCFDMA_DIR], dmawp[MCFDMA_DIR]);
#endif
}
/* Set transfer address for specific DMA channel */
static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)
{
volatile unsigned int *dmalp;
#ifdef DMA_DEBUG
printk("set_dma_addr(dmanr=%d,a=%x)\n", dmanr, a);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
/* Determine which address registers are used for memory/device accesses */
if (dmalp[MCFDMA_DMR] & MCFDMA_DMR_SRCM) {
/* Source incrementing, must be memory */
dmalp[MCFDMA_DSAR] = a;
/* Set dest address, must be device */
dmalp[MCFDMA_DDAR] = dma_device_address[dmanr];
} else {
/* Destination incrementing, must be memory */
dmalp[MCFDMA_DDAR] = a;
/* Set source address, must be device */
dmalp[MCFDMA_DSAR] = dma_device_address[dmanr];
}
#ifdef DEBUG_DMA
printk("%s(%d): dmanr=%d DMR[%x]=%x SAR[%x]=%08x DAR[%x]=%08x\n",
__FILE__, __LINE__, dmanr, (int) &dmalp[MCFDMA_DMR], dmalp[MCFDMA_DMR],
(int) &dmalp[MCFDMA_DSAR], dmalp[MCFDMA_DSAR],
(int) &dmalp[MCFDMA_DDAR], dmalp[MCFDMA_DDAR]);
#endif
}
/*
* Specific for Coldfire - sets device address.
* Should be called after the mode set call, and before set DMA address.
*/
static __inline__ void set_dma_device_addr(unsigned int dmanr, unsigned int a)
{
#ifdef DMA_DEBUG
printk("set_dma_device_addr(dmanr=%d,a=%x)\n", dmanr, a);
#endif
dma_device_address[dmanr] = a;
}
/*
* NOTE 2: "count" represents _bytes_.
*
* NOTE 3: While a 32-bit register, "count" is only a maximum 24-bit value.
*/
static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
{
volatile unsigned int *dmalp;
#ifdef DMA_DEBUG
printk("set_dma_count(dmanr=%d,count=%d)\n", dmanr, count);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
dmalp[MCFDMA_DBCR] = count;
}
/*
* Get DMA residue count. After a DMA transfer, this
* should return zero. Reading this while a DMA transfer is
* still in progress will return unpredictable results.
* Otherwise, it returns the number of _bytes_ left to transfer.
*/
static __inline__ int get_dma_residue(unsigned int dmanr)
{
volatile unsigned int *dmalp;
unsigned int count;
#ifdef DMA_DEBUG
printk("get_dma_residue(dmanr=%d)\n", dmanr);
#endif
dmalp = (unsigned int *) dma_base_addr[dmanr];
count = dmalp[MCFDMA_DBCR];
return(count);
}
#endif /* !defined(CONFIG_M5272) */
#endif /* CONFIG_COLDFIRE */
/* it's useless on the m68k, but unfortunately needed by the new
bootmem allocator (but this should do it for this) */
#define MAX_DMA_ADDRESS PAGE_OFFSET
#define MAX_DMA_CHANNELS 8
extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */
extern void free_dma(unsigned int dmanr); /* release it again */
#ifdef CONFIG_PCI
extern int isa_dma_bridge_buggy;
#else

9
arch/m68k/include/asm/elf.h
View File

@ -60,6 +60,13 @@ typedef struct user_m68kfp_struct elf_fpregset_t;
is actually used on ASV. */
#define ELF_PLAT_INIT(_r, load_addr) _r->a1 = 0
#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
do { \
(_r)->d3 = _exec_map_addr; \
(_r)->d4 = _interp_map_addr; \
(_r)->d5 = dynamic_addr; \
} while(0)
#if defined(CONFIG_SUN3) || defined(CONFIG_COLDFIRE)
#define ELF_EXEC_PAGESIZE 8192
#else
@ -114,4 +121,6 @@ typedef struct user_m68kfp_struct elf_fpregset_t;
#define ELF_PLATFORM (NULL)
#define ELF_FDPIC_CORE_EFLAGS 0
#endif

1
arch/m68k/include/asm/machdep.h
View File

@ -19,7 +19,6 @@ extern void (*mach_get_model) (char *model);
extern void (*mach_get_hardware_list) (struct seq_file *m);
/* machine dependent timer functions */
extern int (*mach_hwclk)(int, struct rtc_time*);
extern unsigned int (*mach_get_ss)(void);
extern int (*mach_get_rtc_pll)(struct rtc_pll_info *);
extern int (*mach_set_rtc_pll)(struct rtc_pll_info *);
extern void (*mach_reset)( void );

4
arch/m68k/include/asm/mmu.h
View File

@ -6,9 +6,7 @@
/* Default "unsigned long" context */
typedef unsigned long mm_context_t;
#else
typedef struct {
unsigned long end_brk;
} mm_context_t;
#include <asm-generic/mmu.h>
#endif
#endif

3
arch/m68k/include/asm/pgtable_no.h
View File

@ -42,7 +42,8 @@ extern void paging_init(void);
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
*/
#define ZERO_PAGE(vaddr) (virt_to_page(0))
extern void *empty_zero_page;
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
/*
* All 32bit addresses are effectively valid for vmalloc...

5
arch/m68k/include/uapi/asm/ptrace.h
View File

@ -74,7 +74,12 @@ struct switch_stack {
#define PTRACE_GET_THREAD_AREA 25
#define PTRACE_GETFDPIC 31
#define PTRACE_SINGLEBLOCK 33 /* resume execution until next branch */
#define PTRACE_GETFDPIC_EXEC 0
#define PTRACE_GETFDPIC_INTERP 1
#endif /* __ASSEMBLY__ */
#endif /* _UAPI_M68K_PTRACE_H */

58
arch/m68k/kernel/ptrace.c
View File

@ -19,6 +19,8 @@
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/signal.h>
#include <linux/regset.h>
#include <linux/elf.h>
#include <linux/uaccess.h>
#include <asm/page.h>
@ -284,3 +286,59 @@ asmlinkage void syscall_trace_leave(void)
if (test_thread_flag(TIF_SYSCALL_TRACE))
ptrace_report_syscall_exit(task_pt_regs(current), 0);
}
#if defined(CONFIG_BINFMT_ELF_FDPIC) && defined(CONFIG_ELF_CORE)
/*
* Currently the only thing that needs to use regsets for m68k is the
* coredump support of the elf_fdpic loader. Implement the minimum
* definitions required for that.
*/
static int m68k_regset_get(struct task_struct *target,
const struct user_regset *regset,
struct membuf to)
{
struct pt_regs *ptregs = task_pt_regs(target);
u32 uregs[ELF_NGREG];
ELF_CORE_COPY_REGS(uregs, ptregs);
return membuf_write(&to, uregs, sizeof(uregs));
}
enum m68k_regset {
REGSET_GPR,
#ifdef CONFIG_FPU
REGSET_FPU,
#endif
};
static const struct user_regset m68k_user_regsets[] = {
[REGSET_GPR] = {
.core_note_type = NT_PRSTATUS,
.n = ELF_NGREG,
.size = sizeof(u32),
.align = sizeof(u16),
.regset_get = m68k_regset_get,
},
#ifdef CONFIG_FPU
[REGSET_FPU] = {
.core_note_type = NT_PRFPREG,
.n = sizeof(struct user_m68kfp_struct) / sizeof(u32),
.size = sizeof(u32),
.align = sizeof(u32),
}
#endif /* CONFIG_FPU */
};
static const struct user_regset_view user_m68k_view = {
.name = "m68k",
.e_machine = EM_68K,
.ei_osabi = ELF_OSABI,
.regsets = m68k_user_regsets,
.n = ARRAY_SIZE(m68k_user_regsets)
};
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
{
return &user_m68k_view;
}
#endif /* CONFIG_BINFMT_ELF_FDPIC && CONFIG_ELF_CORE */

9
arch/m68k/kernel/setup_mm.c
View File

@ -87,15 +87,6 @@ void (*mach_sched_init) (void) __initdata = NULL;
void (*mach_init_IRQ) (void) __initdata = NULL;
void (*mach_get_model) (char *model);
void (*mach_get_hardware_list) (struct seq_file *m);
/* machine dependent timer functions */
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
unsigned int (*mach_get_ss)(void);
int (*mach_get_rtc_pll)(struct rtc_pll_info *);
int (*mach_set_rtc_pll)(struct rtc_pll_info *);
EXPORT_SYMBOL(mach_get_ss);
EXPORT_SYMBOL(mach_get_rtc_pll);
EXPORT_SYMBOL(mach_set_rtc_pll);
void (*mach_reset)( void );
void (*mach_halt)( void );
void (*mach_power_off)( void );

1
arch/m68k/kernel/setup_no.c
View File

@ -50,7 +50,6 @@ char __initdata command_line[COMMAND_LINE_SIZE];
/* machine dependent timer functions */
void (*mach_sched_init)(void) __initdata = NULL;
int (*mach_hwclk) (int, struct rtc_time*);
/* machine dependent reboot functions */
void (*mach_reset)(void);

9
arch/m68k/kernel/time.c
View File

@ -63,6 +63,15 @@ void timer_heartbeat(void)
#endif /* CONFIG_HEARTBEAT */
#ifdef CONFIG_M68KCLASSIC
/* machine dependent timer functions */
int (*mach_hwclk) (int, struct rtc_time*);
EXPORT_SYMBOL(mach_hwclk);
int (*mach_get_rtc_pll)(struct rtc_pll_info *);
int (*mach_set_rtc_pll)(struct rtc_pll_info *);
EXPORT_SYMBOL(mach_get_rtc_pll);
EXPORT_SYMBOL(mach_set_rtc_pll);
#if !IS_BUILTIN(CONFIG_RTC_DRV_GENERIC)
void read_persistent_clock64(struct timespec64 *ts)
{

1
arch/m68k/mm/motorola.c
View File

@ -27,7 +27,6 @@
#include <asm/pgalloc.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/dma.h>
#ifdef CONFIG_ATARI
#include <asm/atari_stram.h>
#endif

7
arch/m68k/q40/config.c
View File

@ -41,7 +41,6 @@ static void q40_get_model(char *model);
extern void q40_sched_init(void);
static int q40_hwclk(int, struct rtc_time *);
static unsigned int q40_get_ss(void);
static int q40_get_rtc_pll(struct rtc_pll_info *pll);
static int q40_set_rtc_pll(struct rtc_pll_info *pll);
@ -169,7 +168,6 @@ void __init config_q40(void)
mach_init_IRQ = q40_init_IRQ;
mach_hwclk = q40_hwclk;
mach_get_ss = q40_get_ss;
mach_get_rtc_pll = q40_get_rtc_pll;
mach_set_rtc_pll = q40_set_rtc_pll;
@ -246,11 +244,6 @@ static int q40_hwclk(int op, struct rtc_time *t)
return 0;
}
static unsigned int q40_get_ss(void)
{
return bcd2bin(Q40_RTC_SECS);
}
/* get and set PLL calibration of RTC clock */
#define Q40_RTC_PLL_MASK ((1<<5)-1)
#define Q40_RTC_PLL_SIGN (1<<5)

2
drivers/mmc/host/Kconfig
View File

@ -508,7 +508,7 @@ config MMC_OMAP_HS
config MMC_WBSD
tristate "Winbond W83L51xD SD/MMC Card Interface support"
depends on ISA_DMA_API && !M68K
depends on ISA_DMA_API
help
This selects the Winbond(R) W83L51xD Secure digital and
Multimedia card Interface.

2
fs/Kconfig.binfmt
View File

@ -58,7 +58,7 @@ config ARCH_USE_GNU_PROPERTY
config BINFMT_ELF_FDPIC
bool "Kernel support for FDPIC ELF binaries"
default y if !BINFMT_ELF
depends on (ARM || (SUPERH && !MMU))
depends on ARM || ((M68K || SUPERH) && !MMU)
select ELFCORE
help
ELF FDPIC binaries are based on ELF, but allow the individual load

2
sound/core/Makefile
View File

@ -9,9 +9,7 @@ ifneq ($(CONFIG_SND_PROC_FS),)
snd-y += info.o
snd-$(CONFIG_SND_OSSEMUL) += info_oss.o
endif
ifneq ($(CONFIG_M68K),y)
snd-$(CONFIG_ISA_DMA_API) += isadma.o
endif
snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o
snd-$(CONFIG_SND_VMASTER) += vmaster.o
snd-$(CONFIG_SND_JACK) += ctljack.o jack.o

2
sound/isa/Kconfig
View File

@ -22,7 +22,7 @@ config SND_SB16_DSP
menuconfig SND_ISA
bool "ISA sound devices"
depends on ISA || COMPILE_TEST
depends on ISA_DMA_API && !M68K
depends on ISA_DMA_API
default y
help
Support for sound devices connected via the ISA bus.