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powerpc/85xx: Remove FSL_85XX_CACHE_SRAM

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CONFIG_FSL_85XX_CACHE_SRAM is an option that is not
user selectable and which is not selected by any driver
nor any defconfig.

Remove it and all associated code.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/9949813a6b758903b7bee910f798ba2ca82ff8ee.1648720908.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2022-03-31 12:03:06 +02:00 committed by Michael Ellerman
parent 5dd9e27ea4
commit dc21ed2aef
7 changed files with 0 additions and 516 deletions
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20
Documentation/devicetree/bindings/powerpc/fsl/cache_sram.txt
View file

@ -1,20 +0,0 @@
* Freescale PQ3 and QorIQ based Cache SRAM
Freescale's mpc85xx and some QorIQ platforms provide an
option of configuring a part of (or full) cache memory
as SRAM. This cache SRAM representation in the device
tree should be done as under:-
Required properties:
- compatible : should be "fsl,p2020-cache-sram"
- fsl,cache-sram-ctlr-handle : points to the L2 controller
- reg : offset and length of the cache-sram.
Example:
cache-sram@fff00000 {
fsl,cache-sram-ctlr-handle = <&L2>;
reg = <0 0xfff00000 0 0x10000>;
compatible = "fsl,p2020-cache-sram";
};

35
arch/powerpc/include/asm/fsl_85xx_cache_sram.h
View file

@ -1,35 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright 2009 Freescale Semiconductor, Inc.
*
* Cache SRAM handling for QorIQ platform
*
* Author: Vivek Mahajan <vivek.mahajan@freescale.com>
* This file is derived from the original work done
* by Sylvain Munaut for the Bestcomm SRAM allocator.
*/
#ifndef __ASM_POWERPC_FSL_85XX_CACHE_SRAM_H__
#define __ASM_POWERPC_FSL_85XX_CACHE_SRAM_H__
#include <asm/rheap.h>
#include <linux/spinlock.h>
/*
* Cache-SRAM
*/
struct mpc85xx_cache_sram {
phys_addr_t base_phys;
void *base_virt;
unsigned int size;
rh_info_t *rh;
spinlock_t lock;
};
extern void mpc85xx_cache_sram_free(void *ptr);
extern void *mpc85xx_cache_sram_alloc(unsigned int size,
phys_addr_t *phys, unsigned int align);
#endif /* __AMS_POWERPC_FSL_85XX_CACHE_SRAM_H__ */

9
arch/powerpc/platforms/85xx/Kconfig
View file

@ -16,15 +16,6 @@ if FSL_SOC_BOOKE
if PPC32
config FSL_85XX_CACHE_SRAM
bool
select PPC_LIB_RHEAP
help
When selected, this option enables cache-sram support
for memory allocation on P1/P2 QorIQ platforms.
cache-sram-size and cache-sram-offset kernel boot
parameters should be passed when this option is enabled.
config BSC9131_RDB
bool "Freescale BSC9131RDB"
select DEFAULT_UIMAGE

1
arch/powerpc/sysdev/Makefile
View file

@ -23,7 +23,6 @@ obj-$(CONFIG_FSL_PMC) += fsl_pmc.o
obj-$(CONFIG_FSL_CORENET_RCPM) += fsl_rcpm.o
obj-$(CONFIG_FSL_LBC) += fsl_lbc.o
obj-$(CONFIG_FSL_GTM) += fsl_gtm.o
obj-$(CONFIG_FSL_85XX_CACHE_SRAM) += fsl_85xx_l2ctlr.o fsl_85xx_cache_sram.o
obj-$(CONFIG_FSL_RIO) += fsl_rio.o fsl_rmu.o
obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o
obj-$(CONFIG_RTC_DRV_CMOS) += rtc_cmos_setup.o

88
arch/powerpc/sysdev/fsl_85xx_cache_ctlr.h
View file

@ -1,88 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright 2009-2010, 2012 Freescale Semiconductor, Inc
*
* QorIQ based Cache Controller Memory Mapped Registers
*
* Author: Vivek Mahajan <vivek.mahajan@freescale.com>
*/
#ifndef __FSL_85XX_CACHE_CTLR_H__
#define __FSL_85XX_CACHE_CTLR_H__
#define L2CR_L2FI 0x40000000 /* L2 flash invalidate */
#define L2CR_L2IO 0x00200000 /* L2 instruction only */
#define L2CR_SRAM_ZERO 0x00000000 /* L2SRAM zero size */
#define L2CR_SRAM_FULL 0x00010000 /* L2SRAM full size */
#define L2CR_SRAM_HALF 0x00020000 /* L2SRAM half size */
#define L2CR_SRAM_TWO_HALFS 0x00030000 /* L2SRAM two half sizes */
#define L2CR_SRAM_QUART 0x00040000 /* L2SRAM one quarter size */
#define L2CR_SRAM_TWO_QUARTS 0x00050000 /* L2SRAM two quarter size */
#define L2CR_SRAM_EIGHTH 0x00060000 /* L2SRAM one eighth size */
#define L2CR_SRAM_TWO_EIGHTH 0x00070000 /* L2SRAM two eighth size */
#define L2SRAM_OPTIMAL_SZ_SHIFT 0x00000003 /* Optimum size for L2SRAM */
#define L2SRAM_BAR_MSK_LO18 0xFFFFC000 /* Lower 18 bits */
#define L2SRAM_BARE_MSK_HI4 0x0000000F /* Upper 4 bits */
enum cache_sram_lock_ways {
LOCK_WAYS_ZERO,
LOCK_WAYS_EIGHTH,
LOCK_WAYS_TWO_EIGHTH,
LOCK_WAYS_HALF = 4,
LOCK_WAYS_FULL = 8,
};
struct mpc85xx_l2ctlr {
u32 ctl; /* 0x000 - L2 control */
u8 res1[0xC];
u32 ewar0; /* 0x010 - External write address 0 */
u32 ewarea0; /* 0x014 - External write address extended 0 */
u32 ewcr0; /* 0x018 - External write ctrl */
u8 res2[4];
u32 ewar1; /* 0x020 - External write address 1 */
u32 ewarea1; /* 0x024 - External write address extended 1 */
u32 ewcr1; /* 0x028 - External write ctrl 1 */
u8 res3[4];
u32 ewar2; /* 0x030 - External write address 2 */
u32 ewarea2; /* 0x034 - External write address extended 2 */
u32 ewcr2; /* 0x038 - External write ctrl 2 */
u8 res4[4];
u32 ewar3; /* 0x040 - External write address 3 */
u32 ewarea3; /* 0x044 - External write address extended 3 */
u32 ewcr3; /* 0x048 - External write ctrl 3 */
u8 res5[0xB4];
u32 srbar0; /* 0x100 - SRAM base address 0 */
u32 srbarea0; /* 0x104 - SRAM base addr reg ext address 0 */
u32 srbar1; /* 0x108 - SRAM base address 1 */
u32 srbarea1; /* 0x10C - SRAM base addr reg ext address 1 */
u8 res6[0xCF0];
u32 errinjhi; /* 0xE00 - Error injection mask high */
u32 errinjlo; /* 0xE04 - Error injection mask low */
u32 errinjctl; /* 0xE08 - Error injection tag/ecc control */
u8 res7[0x14];
u32 captdatahi; /* 0xE20 - Error data high capture */
u32 captdatalo; /* 0xE24 - Error data low capture */
u32 captecc; /* 0xE28 - Error syndrome */
u8 res8[0x14];
u32 errdet; /* 0xE40 - Error detect */
u32 errdis; /* 0xE44 - Error disable */
u32 errinten; /* 0xE48 - Error interrupt enable */
u32 errattr; /* 0xE4c - Error attribute capture */
u32 erradrrl; /* 0xE50 - Error address capture low */
u32 erradrrh; /* 0xE54 - Error address capture high */
u32 errctl; /* 0xE58 - Error control */
u8 res9[0x1A4];
};
struct sram_parameters {
unsigned int sram_size;
phys_addr_t sram_offset;
};
extern int instantiate_cache_sram(struct platform_device *dev,
struct sram_parameters sram_params);
extern void remove_cache_sram(struct platform_device *dev);
#endif /* __FSL_85XX_CACHE_CTLR_H__ */

147
arch/powerpc/sysdev/fsl_85xx_cache_sram.c
View file

@ -1,147 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2009-2010 Freescale Semiconductor, Inc.
*
* Simple memory allocator abstraction for QorIQ (P1/P2) based Cache-SRAM
*
* Author: Vivek Mahajan <vivek.mahajan@freescale.com>
*
* This file is derived from the original work done
* by Sylvain Munaut for the Bestcomm SRAM allocator.
*/
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of_platform.h>
#include <linux/pgtable.h>
#include <asm/fsl_85xx_cache_sram.h>
#include "fsl_85xx_cache_ctlr.h"
struct mpc85xx_cache_sram *cache_sram;
void *mpc85xx_cache_sram_alloc(unsigned int size,
phys_addr_t *phys, unsigned int align)
{
unsigned long offset;
unsigned long flags;
if (unlikely(cache_sram == NULL))
return NULL;
if (!size || (size > cache_sram->size) || (align > cache_sram->size)) {
pr_err("%s(): size(=%x) or align(=%x) zero or too big\n",
__func__, size, align);
return NULL;
}
if ((align & (align - 1)) || align <= 1) {
pr_err("%s(): align(=%x) must be power of two and >1\n",
__func__, align);
return NULL;
}
spin_lock_irqsave(&cache_sram->lock, flags);
offset = rh_alloc_align(cache_sram->rh, size, align, NULL);
spin_unlock_irqrestore(&cache_sram->lock, flags);
if (IS_ERR_VALUE(offset))
return NULL;
*phys = cache_sram->base_phys + offset;
return (unsigned char *)cache_sram->base_virt + offset;
}
EXPORT_SYMBOL(mpc85xx_cache_sram_alloc);
void mpc85xx_cache_sram_free(void *ptr)
{
unsigned long flags;
BUG_ON(!ptr);
spin_lock_irqsave(&cache_sram->lock, flags);
rh_free(cache_sram->rh, ptr - cache_sram->base_virt);
spin_unlock_irqrestore(&cache_sram->lock, flags);
}
EXPORT_SYMBOL(mpc85xx_cache_sram_free);
int __init instantiate_cache_sram(struct platform_device *dev,
struct sram_parameters sram_params)
{
int ret = 0;
if (cache_sram) {
dev_err(&dev->dev, "Already initialized cache-sram\n");
return -EBUSY;
}
cache_sram = kzalloc(sizeof(struct mpc85xx_cache_sram), GFP_KERNEL);
if (!cache_sram) {
dev_err(&dev->dev, "Out of memory for cache_sram structure\n");
return -ENOMEM;
}
cache_sram->base_phys = sram_params.sram_offset;
cache_sram->size = sram_params.sram_size;
if (!request_mem_region(cache_sram->base_phys, cache_sram->size,
"fsl_85xx_cache_sram")) {
dev_err(&dev->dev, "%pOF: request memory failed\n",
dev->dev.of_node);
ret = -ENXIO;
goto out_free;
}
cache_sram->base_virt = ioremap_coherent(cache_sram->base_phys,
cache_sram->size);
if (!cache_sram->base_virt) {
dev_err(&dev->dev, "%pOF: ioremap_coherent failed\n",
dev->dev.of_node);
ret = -ENOMEM;
goto out_release;
}
cache_sram->rh = rh_create(sizeof(unsigned int));
if (IS_ERR(cache_sram->rh)) {
dev_err(&dev->dev, "%pOF: Unable to create remote heap\n",
dev->dev.of_node);
ret = PTR_ERR(cache_sram->rh);
goto out_unmap;
}
rh_attach_region(cache_sram->rh, 0, cache_sram->size);
spin_lock_init(&cache_sram->lock);
dev_info(&dev->dev, "[base:0x%llx, size:0x%x] configured and loaded\n",
(unsigned long long)cache_sram->base_phys, cache_sram->size);
return 0;
out_unmap:
iounmap(cache_sram->base_virt);
out_release:
release_mem_region(cache_sram->base_phys, cache_sram->size);
out_free:
kfree(cache_sram);
return ret;
}
void remove_cache_sram(struct platform_device *dev)
{
BUG_ON(!cache_sram);
rh_detach_region(cache_sram->rh, 0, cache_sram->size);
rh_destroy(cache_sram->rh);
iounmap(cache_sram->base_virt);
release_mem_region(cache_sram->base_phys, cache_sram->size);
kfree(cache_sram);
cache_sram = NULL;
dev_info(&dev->dev, "MPC85xx Cache-SRAM driver unloaded\n");
}

216
arch/powerpc/sysdev/fsl_85xx_l2ctlr.c
View file

@ -1,216 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2009-2010, 2012 Freescale Semiconductor, Inc.
*
* QorIQ (P1/P2) L2 controller init for Cache-SRAM instantiation
*
* Author: Vivek Mahajan <vivek.mahajan@freescale.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <asm/io.h>
#include "fsl_85xx_cache_ctlr.h"
static char *sram_size;
static char *sram_offset;
struct mpc85xx_l2ctlr __iomem *l2ctlr;
static int get_cache_sram_params(struct sram_parameters *sram_params)
{
unsigned long long addr;
unsigned int size;
if (!sram_size || (kstrtouint(sram_size, 0, &size) < 0))
return -EINVAL;
if (!sram_offset || (kstrtoull(sram_offset, 0, &addr) < 0))
return -EINVAL;
sram_params->sram_offset = addr;
sram_params->sram_size = size;
return 0;
}
static int __init get_size_from_cmdline(char *str)
{
if (!str)
return 0;
sram_size = str;
return 1;
}
static int __init get_offset_from_cmdline(char *str)
{
if (!str)
return 0;
sram_offset = str;
return 1;
}
__setup("cache-sram-size=", get_size_from_cmdline);
__setup("cache-sram-offset=", get_offset_from_cmdline);
static int mpc85xx_l2ctlr_of_probe(struct platform_device *dev)
{
long rval;
unsigned int rem;
unsigned char ways;
const unsigned int *prop;
unsigned int l2cache_size;
struct sram_parameters sram_params;
if (!dev->dev.of_node) {
dev_err(&dev->dev, "Device's OF-node is NULL\n");
return -EINVAL;
}
prop = of_get_property(dev->dev.of_node, "cache-size", NULL);
if (!prop) {
dev_err(&dev->dev, "Missing L2 cache-size\n");
return -EINVAL;
}
l2cache_size = *prop;
if (get_cache_sram_params(&sram_params))
return 0; /* fall back to L2 cache only */
rem = l2cache_size % sram_params.sram_size;
ways = LOCK_WAYS_FULL * sram_params.sram_size / l2cache_size;
if (rem || (ways & (ways - 1))) {
dev_err(&dev->dev, "Illegal cache-sram-size in command line\n");
return -EINVAL;
}
l2ctlr = of_iomap(dev->dev.of_node, 0);
if (!l2ctlr) {
dev_err(&dev->dev, "Can't map L2 controller\n");
return -EINVAL;
}
/*
* Write bits[0-17] to srbar0
*/
out_be32(&l2ctlr->srbar0,
lower_32_bits(sram_params.sram_offset) & L2SRAM_BAR_MSK_LO18);
/*
* Write bits[18-21] to srbare0
*/
#ifdef CONFIG_PHYS_64BIT
out_be32(&l2ctlr->srbarea0,
upper_32_bits(sram_params.sram_offset) & L2SRAM_BARE_MSK_HI4);
#endif
clrsetbits_be32(&l2ctlr->ctl, L2CR_L2E, L2CR_L2FI);
switch (ways) {
case LOCK_WAYS_EIGHTH:
setbits32(&l2ctlr->ctl,
L2CR_L2E | L2CR_L2FI | L2CR_SRAM_EIGHTH);
break;
case LOCK_WAYS_TWO_EIGHTH:
setbits32(&l2ctlr->ctl,
L2CR_L2E | L2CR_L2FI | L2CR_SRAM_QUART);
break;
case LOCK_WAYS_HALF:
setbits32(&l2ctlr->ctl,
L2CR_L2E | L2CR_L2FI | L2CR_SRAM_HALF);
break;
case LOCK_WAYS_FULL:
default:
setbits32(&l2ctlr->ctl,
L2CR_L2E | L2CR_L2FI | L2CR_SRAM_FULL);
break;
}
eieio();
rval = instantiate_cache_sram(dev, sram_params);
if (rval < 0) {
dev_err(&dev->dev, "Can't instantiate Cache-SRAM\n");
iounmap(l2ctlr);
return -EINVAL;
}
return 0;
}
static int mpc85xx_l2ctlr_of_remove(struct platform_device *dev)
{
BUG_ON(!l2ctlr);
iounmap(l2ctlr);
remove_cache_sram(dev);
dev_info(&dev->dev, "MPC85xx L2 controller unloaded\n");
return 0;
}
static const struct of_device_id mpc85xx_l2ctlr_of_match[] = {
{
.compatible = "fsl,p2020-l2-cache-controller",
},
{
.compatible = "fsl,p2010-l2-cache-controller",
},
{
.compatible = "fsl,p1020-l2-cache-controller",
},
{
.compatible = "fsl,p1011-l2-cache-controller",
},
{
.compatible = "fsl,p1013-l2-cache-controller",
},
{
.compatible = "fsl,p1022-l2-cache-controller",
},
{
.compatible = "fsl,mpc8548-l2-cache-controller",
},
{ .compatible = "fsl,mpc8544-l2-cache-controller",},
{ .compatible = "fsl,mpc8572-l2-cache-controller",},
{ .compatible = "fsl,mpc8536-l2-cache-controller",},
{ .compatible = "fsl,p1021-l2-cache-controller",},
{ .compatible = "fsl,p1012-l2-cache-controller",},
{ .compatible = "fsl,p1025-l2-cache-controller",},
{ .compatible = "fsl,p1016-l2-cache-controller",},
{ .compatible = "fsl,p1024-l2-cache-controller",},
{ .compatible = "fsl,p1015-l2-cache-controller",},
{ .compatible = "fsl,p1010-l2-cache-controller",},
{ .compatible = "fsl,bsc9131-l2-cache-controller",},
{},
};
static struct platform_driver mpc85xx_l2ctlr_of_platform_driver = {
.driver = {
.name = "fsl-l2ctlr",
.of_match_table = mpc85xx_l2ctlr_of_match,
},
.probe = mpc85xx_l2ctlr_of_probe,
.remove = mpc85xx_l2ctlr_of_remove,
};
static __init int mpc85xx_l2ctlr_of_init(void)
{
return platform_driver_register(&mpc85xx_l2ctlr_of_platform_driver);
}
static void __exit mpc85xx_l2ctlr_of_exit(void)
{
platform_driver_unregister(&mpc85xx_l2ctlr_of_platform_driver);
}
subsys_initcall(mpc85xx_l2ctlr_of_init);
module_exit(mpc85xx_l2ctlr_of_exit);
MODULE_DESCRIPTION("Freescale MPC85xx L2 controller init");
MODULE_LICENSE("GPL v2");