Commit dba7a77c authored by Grant Erickson's avatar Grant Erickson Committed by Linus Torvalds

edac: new ppc4xx driver module

This adds support for an EDAC memory controller adaptation driver for the
"ibm,sdram-4xx-ddr2" ECC controller realized in the AMCC PowerPC 405EX[r].

At present, this driver has been developed and tested against the
controller realization in the AMCC PPC405EX[r] on the AMCC Kilauea and
Haleakala boards (256 MiB w/o ECC memory soldered onto the board) and a
proprietary board based on those designs (128 MiB ECC memory, also
soldered onto the board).

In the future, dynamic feature detection and handling needs to be added
for the other realizations of this controller found in the 440SP, 440SPe,
460EX, 460GT and 460SX.

Eventually, this driver will likely be evolved and adapted to the above
variant realizations of this controller as well as broken apart to handle
the other known ECC-capable controllers prevalent in other PPC4xx
processors:

  - IBM SDRAM (405GP, 405CR and 405EP) "ibm,sdram-4xx"
  - IBM DDR1 (440GP, 440GX, 440EP and 440GR) "ibm,sdram-4xx-ddr"
  - Denali DDR1/DDR2 (440EPX and 440GRX) "denali,sdram-4xx-ddr2"

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: default avatarGrant Erickson <gerickson@nuovations.com>
Signed-off-by: default avatarDoug Thompson <dougthompson@xmission.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4577ca55
......@@ -181,4 +181,13 @@ config EDAC_CELL
Cell Broadband Engine internal memory controller
on platform without a hypervisor
config EDAC_PPC4XX
tristate "PPC4xx IBM DDR2 Memory Controller"
depends on EDAC_MM_EDAC && 4xx
help
This enables support for EDAC on the ECC memory used
with the IBM DDR2 memory controller found in various
PowerPC 4xx embedded processors such as the 405EX[r],
440SP, 440SPe, 460EX, 460GT and 460SX.
endif # EDAC
......@@ -34,4 +34,4 @@ obj-$(CONFIG_EDAC_PASEMI) += pasemi_edac.o
obj-$(CONFIG_EDAC_MPC85XX) += mpc85xx_edac.o
obj-$(CONFIG_EDAC_MV64X60) += mv64x60_edac.o
obj-$(CONFIG_EDAC_CELL) += cell_edac.o
obj-$(CONFIG_EDAC_PPC4XX) += ppc4xx_edac.o
This diff is collapsed.
/*
* Copyright (c) 2008 Nuovation System Designs, LLC
* Grant Erickson <gerickson@nuovations.com>
*
* This file defines processor mnemonics for accessing and managing
* the IBM DDR1/DDR2 ECC controller found in the 405EX[r], 440SP,
* 440SPe, 460EX, 460GT and 460SX.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
*/
#ifndef __PPC4XX_EDAC_H
#define __PPC4XX_EDAC_H
#include <linux/types.h>
/*
* Macro for generating register field mnemonics
*/
#define PPC_REG_BITS 32
#define PPC_REG_VAL(bit, val) ((val) << ((PPC_REG_BITS - 1) - (bit)))
#define PPC_REG_DECODE(bit, val) ((val) >> ((PPC_REG_BITS - 1) - (bit)))
/*
* IBM 4xx DDR1/DDR2 SDRAM memory controller registers (at least those
* relevant to ECC)
*/
#define SDRAM_BESR 0x00 /* Error status (read/clear) */
#define SDRAM_BESRT 0x01 /* Error statuss (test/set) */
#define SDRAM_BEARL 0x02 /* Error address low */
#define SDRAM_BEARH 0x03 /* Error address high */
#define SDRAM_WMIRQ 0x06 /* Write master (read/clear) */
#define SDRAM_WMIRQT 0x07 /* Write master (test/set) */
#define SDRAM_MCOPT1 0x20 /* Controller options 1 */
#define SDRAM_MBXCF_BASE 0x40 /* Bank n configuration base */
#define SDRAM_MBXCF(n) (SDRAM_MBXCF_BASE + (4 * (n)))
#define SDRAM_MB0CF SDRAM_MBXCF(0)
#define SDRAM_MB1CF SDRAM_MBXCF(1)
#define SDRAM_MB2CF SDRAM_MBXCF(2)
#define SDRAM_MB3CF SDRAM_MBXCF(3)
#define SDRAM_ECCCR 0x98 /* ECC error status */
#define SDRAM_ECCES SDRAM_ECCCR
/*
* PLB Master IDs
*/
#define SDRAM_PLB_M0ID_FIRST 0
#define SDRAM_PLB_M0ID_ICU SDRAM_PLB_M0ID_FIRST
#define SDRAM_PLB_M0ID_PCIE0 1
#define SDRAM_PLB_M0ID_PCIE1 2
#define SDRAM_PLB_M0ID_DMA 3
#define SDRAM_PLB_M0ID_DCU 4
#define SDRAM_PLB_M0ID_OPB 5
#define SDRAM_PLB_M0ID_MAL 6
#define SDRAM_PLB_M0ID_SEC 7
#define SDRAM_PLB_M0ID_AHB 8
#define SDRAM_PLB_M0ID_LAST SDRAM_PLB_M0ID_AHB
#define SDRAM_PLB_M0ID_COUNT (SDRAM_PLB_M0ID_LAST - \
SDRAM_PLB_M0ID_FIRST + 1)
/*
* Memory Controller Bus Error Status Register
*/
#define SDRAM_BESR_MASK PPC_REG_VAL(7, 0xFF)
#define SDRAM_BESR_M0ID_MASK PPC_REG_VAL(3, 0xF)
#define SDRAM_BESR_M0ID_DECODE(n) PPC_REG_DECODE(3, n)
#define SDRAM_BESR_M0ID_ICU PPC_REG_VAL(3, SDRAM_PLB_M0ID_ICU)
#define SDRAM_BESR_M0ID_PCIE0 PPC_REG_VAL(3, SDRAM_PLB_M0ID_PCIE0)
#define SDRAM_BESR_M0ID_PCIE1 PPC_REG_VAL(3, SDRAM_PLB_M0ID_PCIE1)
#define SDRAM_BESR_M0ID_DMA PPC_REG_VAL(3, SDRAM_PLB_M0ID_DMA)
#define SDRAM_BESR_M0ID_DCU PPC_REG_VAL(3, SDRAM_PLB_M0ID_DCU)
#define SDRAM_BESR_M0ID_OPB PPC_REG_VAL(3, SDRAM_PLB_M0ID_OPB)
#define SDRAM_BESR_M0ID_MAL PPC_REG_VAL(3, SDRAM_PLB_M0ID_MAL)
#define SDRAM_BESR_M0ID_SEC PPC_REG_VAL(3, SDRAM_PLB_M0ID_SEC)
#define SDRAM_BESR_M0ID_AHB PPC_REG_VAL(3, SDRAM_PLB_M0ID_AHB)
#define SDRAM_BESR_M0ET_MASK PPC_REG_VAL(6, 0x7)
#define SDRAM_BESR_M0ET_NONE PPC_REG_VAL(6, 0)
#define SDRAM_BESR_M0ET_ECC PPC_REG_VAL(6, 1)
#define SDRAM_BESR_M0RW_MASK PPC_REG_VAL(7, 1)
#define SDRAM_BESR_M0RW_WRITE PPC_REG_VAL(7, 0)
#define SDRAM_BESR_M0RW_READ PPC_REG_VAL(7, 1)
/*
* Memory Controller PLB Write Master Interrupt Register
*/
#define SDRAM_WMIRQ_MASK PPC_REG_VAL(8, 0x1FF)
#define SDRAM_WMIRQ_ENCODE(id) PPC_REG_VAL((id % \
SDRAM_PLB_M0ID_COUNT), 1)
#define SDRAM_WMIRQ_ICU PPC_REG_VAL(SDRAM_PLB_M0ID_ICU, 1)
#define SDRAM_WMIRQ_PCIE0 PPC_REG_VAL(SDRAM_PLB_M0ID_PCIE0, 1)
#define SDRAM_WMIRQ_PCIE1 PPC_REG_VAL(SDRAM_PLB_M0ID_PCIE1, 1)
#define SDRAM_WMIRQ_DMA PPC_REG_VAL(SDRAM_PLB_M0ID_DMA, 1)
#define SDRAM_WMIRQ_DCU PPC_REG_VAL(SDRAM_PLB_M0ID_DCU, 1)
#define SDRAM_WMIRQ_OPB PPC_REG_VAL(SDRAM_PLB_M0ID_OPB, 1)
#define SDRAM_WMIRQ_MAL PPC_REG_VAL(SDRAM_PLB_M0ID_MAL, 1)
#define SDRAM_WMIRQ_SEC PPC_REG_VAL(SDRAM_PLB_M0ID_SEC, 1)
#define SDRAM_WMIRQ_AHB PPC_REG_VAL(SDRAM_PLB_M0ID_AHB, 1)
/*
* Memory Controller Options 1 Register
*/
#define SDRAM_MCOPT1_MCHK_MASK PPC_REG_VAL(3, 0x3) /* ECC mask */
#define SDRAM_MCOPT1_MCHK_NON PPC_REG_VAL(3, 0x0) /* No ECC gen */
#define SDRAM_MCOPT1_MCHK_GEN PPC_REG_VAL(3, 0x2) /* ECC gen */
#define SDRAM_MCOPT1_MCHK_CHK PPC_REG_VAL(3, 0x1) /* ECC gen and chk */
#define SDRAM_MCOPT1_MCHK_CHK_REP PPC_REG_VAL(3, 0x3) /* ECC gen/chk/rpt */
#define SDRAM_MCOPT1_MCHK_DECODE(n) ((((u32)(n)) >> 28) & 0x3)
#define SDRAM_MCOPT1_RDEN_MASK PPC_REG_VAL(4, 0x1) /* Rgstrd DIMM mask */
#define SDRAM_MCOPT1_RDEN PPC_REG_VAL(4, 0x1) /* Rgstrd DIMM enbl */
#define SDRAM_MCOPT1_WDTH_MASK PPC_REG_VAL(7, 0x1) /* Width mask */
#define SDRAM_MCOPT1_WDTH_32 PPC_REG_VAL(7, 0x0) /* 32 bits */
#define SDRAM_MCOPT1_WDTH_16 PPC_REG_VAL(7, 0x1) /* 16 bits */
#define SDRAM_MCOPT1_DDR_TYPE_MASK PPC_REG_VAL(11, 0x1) /* DDR type mask */
#define SDRAM_MCOPT1_DDR1_TYPE PPC_REG_VAL(11, 0x0) /* DDR1 type */
#define SDRAM_MCOPT1_DDR2_TYPE PPC_REG_VAL(11, 0x1) /* DDR2 type */
/*
* Memory Bank 0 - n Configuration Register
*/
#define SDRAM_MBCF_BA_MASK PPC_REG_VAL(12, 0x1FFF)
#define SDRAM_MBCF_SZ_MASK PPC_REG_VAL(19, 0xF)
#define SDRAM_MBCF_SZ_DECODE(mbxcf) PPC_REG_DECODE(19, mbxcf)
#define SDRAM_MBCF_SZ_4MB PPC_REG_VAL(19, 0x0)
#define SDRAM_MBCF_SZ_8MB PPC_REG_VAL(19, 0x1)
#define SDRAM_MBCF_SZ_16MB PPC_REG_VAL(19, 0x2)
#define SDRAM_MBCF_SZ_32MB PPC_REG_VAL(19, 0x3)
#define SDRAM_MBCF_SZ_64MB PPC_REG_VAL(19, 0x4)
#define SDRAM_MBCF_SZ_128MB PPC_REG_VAL(19, 0x5)
#define SDRAM_MBCF_SZ_256MB PPC_REG_VAL(19, 0x6)
#define SDRAM_MBCF_SZ_512MB PPC_REG_VAL(19, 0x7)
#define SDRAM_MBCF_SZ_1GB PPC_REG_VAL(19, 0x8)
#define SDRAM_MBCF_SZ_2GB PPC_REG_VAL(19, 0x9)
#define SDRAM_MBCF_SZ_4GB PPC_REG_VAL(19, 0xA)
#define SDRAM_MBCF_SZ_8GB PPC_REG_VAL(19, 0xB)
#define SDRAM_MBCF_AM_MASK PPC_REG_VAL(23, 0xF)
#define SDRAM_MBCF_AM_MODE0 PPC_REG_VAL(23, 0x0)
#define SDRAM_MBCF_AM_MODE1 PPC_REG_VAL(23, 0x1)
#define SDRAM_MBCF_AM_MODE2 PPC_REG_VAL(23, 0x2)
#define SDRAM_MBCF_AM_MODE3 PPC_REG_VAL(23, 0x3)
#define SDRAM_MBCF_AM_MODE4 PPC_REG_VAL(23, 0x4)
#define SDRAM_MBCF_AM_MODE5 PPC_REG_VAL(23, 0x5)
#define SDRAM_MBCF_AM_MODE6 PPC_REG_VAL(23, 0x6)
#define SDRAM_MBCF_AM_MODE7 PPC_REG_VAL(23, 0x7)
#define SDRAM_MBCF_AM_MODE8 PPC_REG_VAL(23, 0x8)
#define SDRAM_MBCF_AM_MODE9 PPC_REG_VAL(23, 0x9)
#define SDRAM_MBCF_BE_MASK PPC_REG_VAL(31, 0x1)
#define SDRAM_MBCF_BE_DISABLE PPC_REG_VAL(31, 0x0)
#define SDRAM_MBCF_BE_ENABLE PPC_REG_VAL(31, 0x1)
/*
* ECC Error Status
*/
#define SDRAM_ECCES_MASK PPC_REG_VAL(21, 0x3FFFFF)
#define SDRAM_ECCES_BNCE_MASK PPC_REG_VAL(15, 0xFFFF)
#define SDRAM_ECCES_BNCE_ENCODE(lane) PPC_REG_VAL(((lane) & 0xF), 1)
#define SDRAM_ECCES_CKBER_MASK PPC_REG_VAL(17, 0x3)
#define SDRAM_ECCES_CKBER_NONE PPC_REG_VAL(17, 0)
#define SDRAM_ECCES_CKBER_16_ECC_0_3 PPC_REG_VAL(17, 2)
#define SDRAM_ECCES_CKBER_32_ECC_0_3 PPC_REG_VAL(17, 1)
#define SDRAM_ECCES_CKBER_32_ECC_4_8 PPC_REG_VAL(17, 2)
#define SDRAM_ECCES_CKBER_32_ECC_0_8 PPC_REG_VAL(17, 3)
#define SDRAM_ECCES_CE PPC_REG_VAL(18, 1)
#define SDRAM_ECCES_UE PPC_REG_VAL(19, 1)
#define SDRAM_ECCES_BKNER_MASK PPC_REG_VAL(21, 0x3)
#define SDRAM_ECCES_BK0ER PPC_REG_VAL(20, 1)
#define SDRAM_ECCES_BK1ER PPC_REG_VAL(21, 1)
#endif /* __PPC4XX_EDAC_H */
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