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-rw-r--r--cpu/ppc4xx/44x_spd_ddr.c49
-rw-r--r--cpu/ppc4xx/44x_spd_ddr2.c120
-rw-r--r--cpu/ppc4xx/Makefile1
-rw-r--r--cpu/ppc4xx/cpu_init.c85
-rw-r--r--cpu/ppc4xx/ecc.c121
-rw-r--r--cpu/ppc4xx/ecc.h42
-rw-r--r--cpu/ppc4xx/sdram.c44
-rw-r--r--cpu/ppc4xx/start.S314
-rw-r--r--cpu/ppc4xx/traps.c9
9 files changed, 526 insertions, 259 deletions
diff --git a/cpu/ppc4xx/44x_spd_ddr.c b/cpu/ppc4xx/44x_spd_ddr.c
index b9cf5cb..b7eeaf2 100644
--- a/cpu/ppc4xx/44x_spd_ddr.c
+++ b/cpu/ppc4xx/44x_spd_ddr.c
@@ -53,6 +53,8 @@
#include <ppc4xx.h>
#include <asm/mmu.h>
+#include "ecc.h"
+
#if defined(CONFIG_SPD_EEPROM) && \
(defined(CONFIG_440GP) || defined(CONFIG_440GX) || \
defined(CONFIG_440EP) || defined(CONFIG_440GR))
@@ -296,10 +298,6 @@ static void program_tr0(unsigned long *dimm_populated,
unsigned long num_dimm_banks);
static void program_tr1(void);
-#ifdef CONFIG_DDR_ECC
-static void program_ecc(unsigned long num_bytes);
-#endif
-
static unsigned long program_bxcr(unsigned long *dimm_populated,
unsigned char *iic0_dimm_addr,
unsigned long num_dimm_banks);
@@ -418,7 +416,7 @@ long int spd_sdram(void) {
/*
* If ecc is enabled, initialize the parity bits.
*/
- program_ecc(total_size);
+ ecc_init(CFG_SDRAM_BASE, total_size);
#endif
return total_size;
@@ -1402,45 +1400,4 @@ static unsigned long program_bxcr(unsigned long *dimm_populated,
return(bank_base_addr);
}
-
-#ifdef CONFIG_DDR_ECC
-static void program_ecc(unsigned long num_bytes)
-{
- unsigned long bank_base_addr;
- unsigned long current_address;
- unsigned long end_address;
- unsigned long address_increment;
- unsigned long cfg0;
-
- /*
- * get Memory Controller Options 0 data
- */
- mfsdram(mem_cfg0, cfg0);
-
- /*
- * reset the bank_base address
- */
- bank_base_addr = CFG_SDRAM_BASE;
-
- if ((cfg0 & SDRAM_CFG0_MCHK_MASK) != SDRAM_CFG0_MCHK_NON) {
- mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | SDRAM_CFG0_MCHK_GEN);
-
- if ((cfg0 & SDRAM_CFG0_DMWD_MASK) == SDRAM_CFG0_DMWD_32)
- address_increment = 4;
- else
- address_increment = 8;
-
- current_address = (unsigned long)(bank_base_addr);
- end_address = (unsigned long)(bank_base_addr) + num_bytes;
-
- while (current_address < end_address) {
- *((unsigned long*)current_address) = 0x00000000;
- current_address += address_increment;
- }
-
- mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
- SDRAM_CFG0_MCHK_CHK);
- }
-}
-#endif /* CONFIG_DDR_ECC */
#endif /* CONFIG_SPD_EEPROM */
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index ec76b71..aa4a530 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -3,9 +3,12 @@
* This SPD SDRAM detection code supports AMCC PPC44x cpu's with a
* DDR2 controller (non Denali Core). Those currently are:
*
- * 405: 405EX
+ * 405: 405EX(r)
* 440/460: 440SP/440SPe/460EX/460GT
*
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ * Grant Erickson <gerickson@nuovations.com>
+
* (C) Copyright 2007-2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
@@ -45,6 +48,8 @@
#include <asm/mmu.h>
#include <asm/cache.h>
+#include "ecc.h"
+
#if defined(CONFIG_SPD_EEPROM) && \
(defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
defined(CONFIG_460EX) || defined(CONFIG_460GT))
@@ -3064,9 +3069,116 @@ static void ppc440sp_sdram_register_dump(void)
dcr_data = mfdcr(SDRAM_R3BAS);
printf(" MQ3_B0BAS = 0x%08X\n", dcr_data);
}
-#else
+#else /* !defined(DEBUG) */
static void ppc440sp_sdram_register_dump(void)
{
}
-#endif
-#endif /* CONFIG_SPD_EEPROM */
+#endif /* defined(DEBUG) */
+#elif defined(CONFIG_405EX)
+/*-----------------------------------------------------------------------------
+ * Function: initdram
+ * Description: Configures the PPC405EX(r) DDR1/DDR2 SDRAM memory
+ * banks. The configuration is performed using static, compile-
+ * time parameters.
+ *---------------------------------------------------------------------------*/
+long initdram(int board_type)
+{
+ unsigned long val;
+
+ /* Set Memory Bank Configuration Registers */
+
+ mtsdram(SDRAM_MB0CF, CFG_SDRAM0_MB0CF);
+ mtsdram(SDRAM_MB1CF, CFG_SDRAM0_MB1CF);
+ mtsdram(SDRAM_MB2CF, CFG_SDRAM0_MB2CF);
+ mtsdram(SDRAM_MB3CF, CFG_SDRAM0_MB3CF);
+
+ /* Set Memory Clock Timing Register */
+
+ mtsdram(SDRAM_CLKTR, CFG_SDRAM0_CLKTR);
+
+ /* Set Refresh Time Register */
+
+ mtsdram(SDRAM_RTR, CFG_SDRAM0_RTR);
+
+ /* Set SDRAM Timing Registers */
+
+ mtsdram(SDRAM_SDTR1, CFG_SDRAM0_SDTR1);
+ mtsdram(SDRAM_SDTR2, CFG_SDRAM0_SDTR2);
+ mtsdram(SDRAM_SDTR3, CFG_SDRAM0_SDTR3);
+
+ /* Set Mode and Extended Mode Registers */
+
+ mtsdram(SDRAM_MMODE, CFG_SDRAM0_MMODE);
+ mtsdram(SDRAM_MEMODE, CFG_SDRAM0_MEMODE);
+
+ /* Set Memory Controller Options 1 Register */
+
+ mtsdram(SDRAM_MCOPT1, CFG_SDRAM0_MCOPT1);
+
+ /* Set Manual Initialization Control Registers */
+
+ mtsdram(SDRAM_INITPLR0, CFG_SDRAM0_INITPLR0);
+ mtsdram(SDRAM_INITPLR1, CFG_SDRAM0_INITPLR1);
+ mtsdram(SDRAM_INITPLR2, CFG_SDRAM0_INITPLR2);
+ mtsdram(SDRAM_INITPLR3, CFG_SDRAM0_INITPLR3);
+ mtsdram(SDRAM_INITPLR4, CFG_SDRAM0_INITPLR4);
+ mtsdram(SDRAM_INITPLR5, CFG_SDRAM0_INITPLR5);
+ mtsdram(SDRAM_INITPLR6, CFG_SDRAM0_INITPLR6);
+ mtsdram(SDRAM_INITPLR7, CFG_SDRAM0_INITPLR7);
+ mtsdram(SDRAM_INITPLR8, CFG_SDRAM0_INITPLR8);
+ mtsdram(SDRAM_INITPLR9, CFG_SDRAM0_INITPLR9);
+ mtsdram(SDRAM_INITPLR10, CFG_SDRAM0_INITPLR10);
+ mtsdram(SDRAM_INITPLR11, CFG_SDRAM0_INITPLR11);
+ mtsdram(SDRAM_INITPLR12, CFG_SDRAM0_INITPLR12);
+ mtsdram(SDRAM_INITPLR13, CFG_SDRAM0_INITPLR13);
+ mtsdram(SDRAM_INITPLR14, CFG_SDRAM0_INITPLR14);
+ mtsdram(SDRAM_INITPLR15, CFG_SDRAM0_INITPLR15);
+
+ /* Set On-Die Termination Registers */
+
+ mtsdram(SDRAM_CODT, CFG_SDRAM0_CODT);
+ mtsdram(SDRAM_MODT0, CFG_SDRAM0_MODT0);
+ mtsdram(SDRAM_MODT1, CFG_SDRAM0_MODT1);
+
+ /* Set Write Timing Register */
+
+ mtsdram(SDRAM_WRDTR, CFG_SDRAM0_WRDTR);
+
+ /*
+ * Start Initialization by SDRAM0_MCOPT2[SREN] = 0 and
+ * SDRAM0_MCOPT2[IPTR] = 1
+ */
+
+ mtsdram(SDRAM_MCOPT2, (SDRAM_MCOPT2_SREN_EXIT |
+ SDRAM_MCOPT2_IPTR_EXECUTE));
+
+ /*
+ * Poll SDRAM0_MCSTAT[MIC] for assertion to indicate the
+ * completion of initialization.
+ */
+
+ do {
+ mfsdram(SDRAM_MCSTAT, val);
+ } while ((val & SDRAM_MCSTAT_MIC_MASK) != SDRAM_MCSTAT_MIC_COMP);
+
+ /* Set Delay Control Registers */
+
+ mtsdram(SDRAM_DLCR, CFG_SDRAM0_DLCR);
+ mtsdram(SDRAM_RDCC, CFG_SDRAM0_RDCC);
+ mtsdram(SDRAM_RQDC, CFG_SDRAM0_RQDC);
+ mtsdram(SDRAM_RFDC, CFG_SDRAM0_RFDC);
+
+ /*
+ * Enable Controller by SDRAM0_MCOPT2[DCEN] = 1:
+ */
+
+ mfsdram(SDRAM_MCOPT2, val);
+ mtsdram(SDRAM_MCOPT2, val | SDRAM_MCOPT2_DCEN_ENABLE);
+
+#if defined(CONFIG_DDR_ECC)
+ ecc_init(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
+#endif /* defined(CONFIG_DDR_ECC) */
+
+ return (CFG_MBYTES_SDRAM << 20);
+}
+#endif /* defined(CONFIG_SPD_EEPROM) && defined(CONFIG_440SP) || ... */
diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index 178c5c6..800bb41 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -45,6 +45,7 @@ COBJS += cpu.o
COBJS += cpu_init.o
COBJS += denali_data_eye.o
COBJS += denali_spd_ddr2.o
+COBJS += ecc.o
COBJS += fdt.o
COBJS += gpio.o
COBJS += i2c.o
diff --git a/cpu/ppc4xx/cpu_init.c b/cpu/ppc4xx/cpu_init.c
index 42eabfe..1e9423a 100644
--- a/cpu/ppc4xx/cpu_init.c
+++ b/cpu/ppc4xx/cpu_init.c
@@ -32,73 +32,6 @@
DECLARE_GLOBAL_DATA_PTR;
#endif
-#ifdef CFG_INIT_DCACHE_CS
-# if (CFG_INIT_DCACHE_CS == 0)
-# define PBxAP pb0ap
-# define PBxCR pb0cr
-# if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
-# define PBxAP_VAL CFG_EBC_PB0AP
-# define PBxCR_VAL CFG_EBC_PB0CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 1)
-# define PBxAP pb1ap
-# define PBxCR pb1cr
-# if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
-# define PBxAP_VAL CFG_EBC_PB1AP
-# define PBxCR_VAL CFG_EBC_PB1CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 2)
-# define PBxAP pb2ap
-# define PBxCR pb2cr
-# if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
-# define PBxAP_VAL CFG_EBC_PB2AP
-# define PBxCR_VAL CFG_EBC_PB2CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 3)
-# define PBxAP pb3ap
-# define PBxCR pb3cr
-# if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
-# define PBxAP_VAL CFG_EBC_PB3AP
-# define PBxCR_VAL CFG_EBC_PB3CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 4)
-# define PBxAP pb4ap
-# define PBxCR pb4cr
-# if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
-# define PBxAP_VAL CFG_EBC_PB4AP
-# define PBxCR_VAL CFG_EBC_PB4CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 5)
-# define PBxAP pb5ap
-# define PBxCR pb5cr
-# if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
-# define PBxAP_VAL CFG_EBC_PB5AP
-# define PBxCR_VAL CFG_EBC_PB5CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 6)
-# define PBxAP pb6ap
-# define PBxCR pb6cr
-# if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
-# define PBxAP_VAL CFG_EBC_PB6AP
-# define PBxCR_VAL CFG_EBC_PB6CR
-# endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 7)
-# define PBxAP pb7ap
-# define PBxCR pb7cr
-# if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
-# define PBxAP_VAL CFG_EBC_PB7AP
-# define PBxCR_VAL CFG_EBC_PB7CR
-# endif
-# endif
-#endif /* CFG_INIT_DCACHE_CS */
-
#ifndef CFG_PLL_RECONFIG
#define CFG_PLL_RECONFIG 0
#endif
@@ -353,24 +286,6 @@ int cpu_init_r (void)
uint pvr = get_pvr();
#endif
-#ifdef CFG_INIT_DCACHE_CS
- /*
- * Flush and invalidate dcache, then disable CS for temporary stack.
- * Afterwards, this CS can be used for other purposes
- */
- dcache_disable(); /* flush and invalidate dcache */
- mtebc(PBxAP, 0);
- mtebc(PBxCR, 0); /* disable CS for temporary stack */
-
-#if (defined(PBxAP_VAL) && defined(PBxCR_VAL))
- /*
- * Write new value into CS register
- */
- mtebc(PBxAP, PBxAP_VAL);
- mtebc(PBxCR, PBxCR_VAL);
-#endif
-#endif /* CFG_INIT_DCACHE_CS */
-
/*
* Write Ethernetaddress into on-chip register
*/
diff --git a/cpu/ppc4xx/ecc.c b/cpu/ppc4xx/ecc.c
new file mode 100644
index 0000000..95b941d
--- /dev/null
+++ b/cpu/ppc4xx/ecc.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ * Grant Erickson <gerickson@nuovations.com>
+ *
+ * (C) Copyright 2005-2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * (C) Copyright 2002
+ * Jun Gu, Artesyn Technology, jung@artesyncp.com
+ *
+ * (C) Copyright 2001
+ * Bill Hunter, Wave 7 Optics, williamhunter@attbi.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will abe useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Description:
+ * This file implements generic DRAM ECC initialization for
+ * PowerPC processors using a SDRAM DDR/DDR2 controller,
+ * including the 405EX(r), 440GP/GX/EP/GR, 440SP(E), and
+ * 460EX/GT.
+ */
+
+#include <common.h>
+#include <ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+
+#include "ecc.h"
+
+#if !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX)
+#if defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC)
+/*
+ * void ecc_init()
+ *
+ * Description:
+ * This routine initializes a range of DRAM ECC memory with known
+ * data and enables ECC checking.
+ *
+ * TO DO:
+ * - Improve performance by utilizing cache.
+ * - Further generalize to make usable by other 4xx variants (e.g.
+ * 440EPx, et al).
+ *
+ * Input(s):
+ * start - A pointer to the start of memory covered by ECC requiring
+ * initialization.
+ * size - The size, in bytes, of the memory covered by ECC requiring
+ * initialization.
+ *
+ * Output(s):
+ * start - A pointer to the start of memory covered by ECC with
+ * CFG_ECC_PATTERN written to all locations and ECC data
+ * primed.
+ *
+ * Returns:
+ * N/A
+ */
+void ecc_init(unsigned long * const start, unsigned long size)
+{
+ const unsigned long pattern = CFG_ECC_PATTERN;
+ unsigned * const end = (unsigned long * const)((long)start + size);
+ unsigned long * current = start;
+ unsigned long mcopt1;
+ long increment;
+
+ if (start >= end)
+ return;
+
+ mfsdram(SDRAM_MCOPT1, mcopt1);
+
+ /* Enable ECC generation without checking or reporting */
+
+ mtsdram(SDRAM_MCOPT1, ((mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) |
+ SDRAM_MCOPT1_MCHK_GEN));
+
+ increment = sizeof(u32);
+
+#if defined(CONFIG_440)
+ /*
+ * Look at the geometry of SDRAM (data width) to determine whether we
+ * can skip words when writing.
+ */
+
+ if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) != SDRAM_MCOPT1_DMWD_32)
+ increment = sizeof(u64);
+#endif /* defined(CONFIG_440) */
+
+ while (current < end) {
+ *current = pattern;
+ current = (unsigned long *)((long)current + increment);
+ }
+
+ /* Wait until the writes are finished. */
+
+ sync();
+
+ /* Enable ECC generation with checking and no reporting */
+
+ mtsdram(SDRAM_MCOPT1, ((mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) |
+ SDRAM_MCOPT1_MCHK_CHK));
+}
+#endif /* defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC) */
+#endif /* !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX) */
diff --git a/cpu/ppc4xx/ecc.h b/cpu/ppc4xx/ecc.h
new file mode 100644
index 0000000..da1c4fd
--- /dev/null
+++ b/cpu/ppc4xx/ecc.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ * Grant Erickson <gerickson@nuovations.com>
+ *
+ * Copyright (c) 2007 DENX Software Engineering, GmbH
+ * Stefan Roese <sr@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will abe useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Description:
+ * This file implements ECC initialization for PowerPC processors
+ * using the SDRAM DDR2 controller, including the 405EX(r),
+ * 440SP(E), 460EX and 460GT.
+ *
+ */
+
+#ifndef _ECC_H_
+#define _ECC_H_
+
+#if !defined(CFG_ECC_PATTERN)
+#define CFG_ECC_PATTERN 0x00000000
+#endif /* !defined(CFG_ECC_PATTERN) */
+
+extern void ecc_init(unsigned long * const start, unsigned long size);
+
+#endif /* _ECC_H_ */
diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index 2724d91..901d650 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -31,6 +31,7 @@
#include <ppc4xx.h>
#include <asm/processor.h>
#include "sdram.h"
+#include "ecc.h"
#ifdef CONFIG_SDRAM_BANK0
@@ -332,49 +333,6 @@ static void sdram_tr1_set(int ram_address, int* tr1_value)
*tr1_value = (first_good + last_bad) / 2;
}
-#ifdef CONFIG_SDRAM_ECC
-static void ecc_init(ulong start, ulong size)
-{
- ulong current_addr; /* current byte address */
- ulong end_addr; /* end of memory region */
- ulong addr_inc; /* address skip between writes */
- ulong cfg0_reg; /* for restoring ECC state */
-
- /*
- * TODO: Enable dcache before running this test (speedup)
- */
-
- mfsdram(mem_cfg0, cfg0_reg);
- mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_GEN);
-
- /*
- * look at geometry of SDRAM (data width) to determine whether we
- * can skip words when writing
- */
- if ((cfg0_reg & SDRAM_CFG0_DRAMWDTH) == SDRAM_CFG0_DRAMWDTH_32)
- addr_inc = 4;
- else
- addr_inc = 8;
-
- current_addr = start;
- end_addr = start + size;
-
- while (current_addr < end_addr) {
- *((ulong *)current_addr) = 0x00000000;
- current_addr += addr_inc;
- }
-
- /*
- * TODO: Flush dcache and disable it again
- */
-
- /*
- * Enable ecc checking and parity errors
- */
- mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_CHK);
-}
-#endif
-
/*
* Autodetect onboard DDR SDRAM on 440 platforms
*
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 0008170..a5d9ec9 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -3,6 +3,8 @@
* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
* Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de>
* Copyright (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ * Grant Erickson <gerickson@nuovations.com>
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -79,34 +81,100 @@
# if (CFG_INIT_DCACHE_CS == 0)
# define PBxAP pb0ap
# define PBxCR pb0cr
+# if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
+# define PBxAP_VAL CFG_EBC_PB0AP
+# define PBxCR_VAL CFG_EBC_PB0CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 1)
# define PBxAP pb1ap
# define PBxCR pb1cr
+# if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
+# define PBxAP_VAL CFG_EBC_PB1AP
+# define PBxCR_VAL CFG_EBC_PB1CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 2)
# define PBxAP pb2ap
# define PBxCR pb2cr
+# if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
+# define PBxAP_VAL CFG_EBC_PB2AP
+# define PBxCR_VAL CFG_EBC_PB2CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 3)
# define PBxAP pb3ap
# define PBxCR pb3cr
+# if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
+# define PBxAP_VAL CFG_EBC_PB3AP
+# define PBxCR_VAL CFG_EBC_PB3CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 4)
# define PBxAP pb4ap
# define PBxCR pb4cr
+# if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
+# define PBxAP_VAL CFG_EBC_PB4AP
+# define PBxCR_VAL CFG_EBC_PB4CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 5)
# define PBxAP pb5ap
# define PBxCR pb5cr
+# if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
+# define PBxAP_VAL CFG_EBC_PB5AP
+# define PBxCR_VAL CFG_EBC_PB5CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 6)
# define PBxAP pb6ap
# define PBxCR pb6cr
+# if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
+# define PBxAP_VAL CFG_EBC_PB6AP
+# define PBxCR_VAL CFG_EBC_PB6CR
+# endif
# endif
# if (CFG_INIT_DCACHE_CS == 7)
# define PBxAP pb7ap
# define PBxCR pb7cr
+# if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
+# define PBxAP_VAL CFG_EBC_PB7AP
+# define PBxCR_VAL CFG_EBC_PB7CR
+# endif
+# endif
+# ifndef PBxAP_VAL
+# define PBxAP_VAL 0
+# endif
+# ifndef PBxCR_VAL
+# define PBxCR_VAL 0
+# endif
+/*
+ * Memory Bank x (nothingness) initialization CFG_INIT_RAM_ADDR + 64 MiB
+ * used as temporary stack pointer for the primordial stack
+ */
+# ifndef CFG_INIT_DCACHE_PBxAR
+# define CFG_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
+ EBC_BXAP_TWT_ENCODE(7) | \
+ EBC_BXAP_BCE_DISABLE | \
+ EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(0) | \
+ EBC_BXAP_OEN_ENCODE(0) | \
+ EBC_BXAP_WBN_ENCODE(0) | \
+ EBC_BXAP_WBF_ENCODE(0) | \
+ EBC_BXAP_TH_ENCODE(2) | \
+ EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_NONDELAYED | \
+ EBC_BXAP_BEM_WRITEONLY | \
+ EBC_BXAP_PEN_DISABLED)
+# endif /* CFG_INIT_DCACHE_PBxAR */
+# ifndef CFG_INIT_DCACHE_PBxCR
+# define CFG_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CFG_INIT_RAM_ADDR) | \
+ EBC_BXCR_BS_64MB | \
+ EBC_BXCR_BU_RW | \
+ EBC_BXCR_BW_16BIT)
+# endif /* CFG_INIT_DCACHE_PBxCR */
+# ifndef CFG_INIT_RAM_PATTERN
+# define CFG_INIT_RAM_PATTERN 0xDEADDEAD
# endif
#endif /* CFG_INIT_DCACHE_CS */
@@ -114,6 +182,23 @@
#error Only 4k of init-ram is supported - please adjust CFG_INIT_RAM_END!
#endif
+/*
+ * Unless otherwise overriden, enable two 128MB cachable instruction regions
+ * at CFG_SDRAM_BASE and another 128MB cacheable instruction region covering
+ * NOR flash at CFG_FLASH_BASE. Disable all cacheable data regions.
+ */
+#if !defined(CFG_ICACHE_SACR_VALUE)
+# define CFG_ICACHE_SACR_VALUE \
+ (PPC_128MB_SACR_VALUE(CFG_SDRAM_BASE + ( 0 << 20)) | \
+ PPC_128MB_SACR_VALUE(CFG_SDRAM_BASE + (128 << 20)) | \
+ PPC_128MB_SACR_VALUE(CFG_FLASH_BASE))
+#endif /* !defined(CFG_ICACHE_SACR_VALUE) */
+
+#if !defined(CFG_DCACHE_SACR_VALUE)
+# define CFG_DCACHE_SACR_VALUE \
+ (0x00000000)
+#endif /* !defined(CFG_DCACHE_SACR_VALUE) */
+
#define function_prolog(func_name) .text; \
.align 2; \
.globl func_name; \
@@ -840,16 +925,16 @@ _start:
/* make sure above stores all comlete before going on */
sync
- /*----------------------------------------------------------------------- */
- /* Enable two 128MB cachable regions. */
- /*----------------------------------------------------------------------- */
- addis r1,r0,0xc000
- addi r1,r1,0x0001
- mticcr r1 /* instruction cache */
+ /* Set-up icache cacheability. */
+ lis r1, CFG_ICACHE_SACR_VALUE@h
+ ori r1, r1, CFG_ICACHE_SACR_VALUE@l
+ mticcr r1
+ isync
- addis r1,r0,0x0000
- addi r1,r1,0x0000
- mtdccr r1 /* data cache */
+ /* Set-up dcache cacheability. */
+ lis r1, CFG_DCACHE_SACR_VALUE@h
+ ori r1, r1, CFG_DCACHE_SACR_VALUE@l
+ mtdccr r1
addis r1,r0,CFG_INIT_RAM_ADDR@h
ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack to SDRAM */
@@ -892,27 +977,20 @@ _start:
/* dbsr is cleared by setting bits to 1) */
mtdbsr r4 /* clear/reset the dbsr */
- /*----------------------------------------------------------------------- */
- /* Invalidate I and D caches. Enable I cache for defined memory regions */
- /* to speed things up. Leave the D cache disabled for now. It will be */
- /* enabled/left disabled later based on user selected menu options. */
- /* Be aware that the I cache may be disabled later based on the menu */
- /* options as well. See miscLib/main.c. */
- /*----------------------------------------------------------------------- */
+ /* Invalidate the i- and d-caches. */
bl invalidate_icache
bl invalidate_dcache
- /*----------------------------------------------------------------------- */
- /* Enable two 128MB cachable regions. */
- /*----------------------------------------------------------------------- */
- lis r4,0xc000
- ori r4,r4,0x0001
- mticcr r4 /* instruction cache */
+ /* Set-up icache cacheability. */
+ lis r4, CFG_ICACHE_SACR_VALUE@h
+ ori r4, r4, CFG_ICACHE_SACR_VALUE@l
+ mticcr r4
isync
- lis r4,0x0000
- ori r4,r4,0x0000
- mtdccr r4 /* data cache */
+ /* Set-up dcache cacheability. */
+ lis r4, CFG_DCACHE_SACR_VALUE@h
+ ori r4, r4, CFG_DCACHE_SACR_VALUE@l
+ mtdccr r4
#if !(defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR)) || defined(CONFIG_405EX)
/*----------------------------------------------------------------------- */
@@ -922,9 +1000,9 @@ _start:
#endif
#if !(defined(CFG_INIT_DCACHE_CS) || defined(CFG_TEMP_STACK_OCM))
/*
- * Boards like the Kilauea (405EX) don't have OCM and can't use
- * DCache for init-ram. So setup stack here directly after the
- * SDRAM is initialized.
+ * For boards that don't have OCM and can't use the data cache
+ * for their primordial stack, setup stack here directly after the
+ * SDRAM is initialized in ext_bus_cntlr_init.
*/
lis r1, CFG_INIT_RAM_ADDR@h
ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack in SDRAM */
@@ -1043,47 +1121,86 @@ start_ram:
/* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
/*----------------------------------------------------------------------- */
#ifdef CFG_INIT_DCACHE_CS
- /*----------------------------------------------------------------------- */
- /* Memory Bank x (nothingness) initialization 1GB+64MEG */
- /* used as temporary stack pointer for stage0 */
- /*----------------------------------------------------------------------- */
- li r4,PBxAP
- mtdcr ebccfga,r4
- lis r4,0x0380
- ori r4,r4,0x0480
- mtdcr ebccfgd,r4
-
- addi r4,0,PBxCR
- mtdcr ebccfga,r4
- lis r4,0x400D
- ori r4,r4,0xa000
- mtdcr ebccfgd,r4
-
- /* turn on data cache for this region */
- lis r4,0x0080
+ li r4, PBxAP
+ mtdcr ebccfga, r4
+ lis r4, CFG_INIT_DCACHE_PBxAR@h
+ ori r4, r4, CFG_INIT_DCACHE_PBxAR@l
+ mtdcr ebccfgd, r4
+
+ addi r4, 0, PBxCR
+ mtdcr ebccfga, r4
+ lis r4, CFG_INIT_DCACHE_PBxCR@h
+ ori r4, r4, CFG_INIT_DCACHE_PBxCR@l
+ mtdcr ebccfgd, r4
+
+ /*
+ * Enable the data cache for the 128MB storage access control region
+ * at CFG_INIT_RAM_ADDR.
+ */
+ mfdccr r4
+ oris r4, r4, PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@h
+ ori r4, r4, PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@l
mtdccr r4
- /* set stack pointer and clear stack to known value */
+ /*
+ * Preallocate data cache lines to be used to avoid a subsequent
+ * cache miss and an ensuing machine check exception when exceptions
+ * are enabled.
+ */
+ li r0, 0
- lis r1,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET@l
+ lis r3, CFG_INIT_RAM_ADDR@h
+ ori r3, r3, CFG_INIT_RAM_ADDR@l
- li r4,2048 /* we store 2048 words to stack */
+ lis r4, CFG_INIT_RAM_END@h
+ ori r4, r4, CFG_INIT_RAM_END@l
+
+ /*
+ * Convert the size, in bytes, to the number of cache lines/blocks
+ * to preallocate.
+ */
+ clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
+ srwi r5, r4, L1_CACHE_SHIFT
+ beq ..load_counter
+ addi r5, r5, 0x0001
+..load_counter:
+ mtctr r5
+
+ /* Preallocate the computed number of cache blocks. */
+..alloc_dcache_block:
+ dcba r0, r3
+ addi r3, r3, L1_CACHE_BYTES
+ bdnz ..alloc_dcache_block
+ sync
+
+ /*
+ * Load the initial stack pointer and data area and convert the size,
+ * in bytes, to the number of words to initialize to a known value.
+ */
+ lis r1, CFG_INIT_RAM_ADDR@h
+ ori r1, r1, CFG_INIT_SP_OFFSET@l
+
+ lis r4, (CFG_INIT_RAM_END >> 2)@h
+ ori r4, r4, (CFG_INIT_RAM_END >> 2)@l
mtctr r4
- lis r2,CFG_INIT_RAM_ADDR@h /* we also clear data area */
- ori r2,r2,CFG_INIT_RAM_END@l /* so cant copy value from r1 */
+ lis r2, CFG_INIT_RAM_ADDR@h
+ ori r2, r2, CFG_INIT_RAM_END@l
- lis r4,0xdead /* we store 0xdeaddead in the stack */
- ori r4,r4,0xdead
+ lis r4, CFG_INIT_RAM_PATTERN@h
+ ori r4, r4, CFG_INIT_RAM_PATTERN@l
..stackloop:
- stwu r4,-4(r2)
+ stwu r4, -4(r2)
bdnz ..stackloop
- li r0, 0 /* Make room for stack frame header and */
- stwu r0, -4(r1) /* clear final stack frame so that */
- stwu r0, -4(r1) /* stack backtraces terminate cleanly */
+ /*
+ * Make room for stack frame header and clear final stack frame so
+ * that stack backtraces terminate cleanly.
+ */
+ stwu r0, -4(r1)
+ stwu r0, -4(r1)
+
/*
* Set up a dummy frame to store reset vector as return address.
* this causes stack underflow to reset board.
@@ -1328,33 +1445,72 @@ in32r:
* This "function" does not return, instead it continues in RAM
* after relocating the monitor code.
*
- * r3 = dest
- * r4 = src
- * r5 = length in bytes
- * r6 = cachelinesize
+ * r3 = Relocated stack pointer
+ * r4 = Relocated global data pointer
+ * r5 = Relocated text pointer
*/
.globl relocate_code
relocate_code:
-#ifdef CONFIG_4xx_DCACHE
+#if defined(CONFIG_4xx_DCACHE) || defined(CFG_INIT_DCACHE_CS)
/*
- * We need to flush the Init Data before the dcache will be
- * invalidated
+ * We need to flush the initial global data (gd_t) before the dcache
+ * will be invalidated.
*/
- /* save regs */
- mr r9,r3
- mr r10,r4
- mr r11,r5
+ /* Save registers */
+ mr r9, r3
+ mr r10, r4
+ mr r11, r5
- mr r3,r4
- addi r4,r4,0x200 /* should be enough for init data */
+ /* Flush initial global data range */
+ mr r3, r4
+ addi r4, r4, CFG_GBL_DATA_SIZE@l
bl flush_dcache_range
- /* restore regs */
- mr r3,r9
- mr r4,r10
- mr r5,r11
-#endif
+#if defined(CFG_INIT_DCACHE_CS)
+ /*
+ * Undo the earlier data cache set-up for the primordial stack and
+ * data area. First, invalidate the data cache and then disable data
+ * cacheability for that area. Finally, restore the EBC values, if
+ * any.
+ */
+
+ /* Invalidate the primordial stack and data area in cache */
+ lis r3, CFG_INIT_RAM_ADDR@h
+ ori r3, r3, CFG_INIT_RAM_ADDR@l
+
+ lis r4, CFG_INIT_RAM_END@h
+ ori r4, r4, CFG_INIT_RAM_END@l
+ add r4, r4, r3
+
+ bl invalidate_dcache_range
+
+ /* Disable cacheability for the region */
+ mfdccr r3
+ lis r4, ~PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@h
+ ori r4, r4, ~PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@l
+ and r3, r3, r4
+ mtdccr r3
+
+ /* Restore the EBC parameters */
+ li r3, PBxAP
+ mtdcr ebccfga, r3
+ lis r3, PBxAP_VAL@h
+ ori r3, r3, PBxAP_VAL@l
+ mtdcr ebccfgd, r3
+
+ li r3, PBxCR
+ mtdcr ebccfga, r3
+ lis r3, PBxCR_VAL@h
+ ori r3, r3, PBxCR_VAL@l
+ mtdcr ebccfgd, r3
+#endif /* defined(CFG_INIT_DCACHE_CS) */
+
+ /* Restore registers */
+ mr r3, r9
+ mr r4, r10
+ mr r5, r11
+#endif /* defined(CONFIG_4xx_DCACHE) || defined(CFG_INIT_DCACHE_CS) */
#ifdef CFG_INIT_RAM_DCACHE
/*
@@ -1396,13 +1552,13 @@ relocate_code:
addi r1,r0,CFG_TLB_FOR_BOOT_FLASH /* Use defined TLB */
#else
addi r1,r0,0x0000 /* Default TLB entry is #0 */
-#endif
+#endif /* CFG_TLB_FOR_BOOT_FLASH */
tlbre r0,r1,0x0002 /* Read contents */
ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
tlbwe r0,r1,0x0002 /* Save it out */
sync
isync
-#endif
+#endif /* defined(CONFIG_440EP) || ... || defined(CONFIG_460GT) */
mr r1, r3 /* Set new stack pointer */
mr r9, r4 /* Save copy of Init Data pointer */
mr r10, r5 /* Save copy of Destination Address */
@@ -1425,7 +1581,7 @@ relocate_code:
/* First our own GOT */
add r14, r14, r15
- /* the the one used by the C code */
+ /* then the one used by the C code */
add r30, r30, r15
/*
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
index 38b6f89..8b7e32a 100644
--- a/cpu/ppc4xx/traps.c
+++ b/cpu/ppc4xx/traps.c
@@ -170,7 +170,7 @@ MachineCheckException(struct pt_regs *regs)
val = get_esr();
-#if !defined(CONFIG_440)
+#if !defined(CONFIG_440) && !defined(CONFIG_405EX)
if (val& ESR_IMCP) {
printf("Instruction");
mtspr(ESR, val & ~ESR_IMCP);
@@ -179,7 +179,7 @@ MachineCheckException(struct pt_regs *regs)
}
printf(" machine check.\n");
-#elif defined(CONFIG_440)
+#elif defined(CONFIG_440) || defined(CONFIG_405EX)
if (val& ESR_IMCP){
printf("Instruction Synchronous Machine Check exception\n");
mtspr(SPRN_ESR, val & ~ESR_IMCP);
@@ -187,10 +187,15 @@ MachineCheckException(struct pt_regs *regs)
val = mfspr(MCSR);
if (val & MCSR_IB)
printf("Instruction Read PLB Error\n");
+#if defined(CONFIG_440)
if (val & MCSR_DRB)
printf("Data Read PLB Error\n");
if (val & MCSR_DWB)
printf("Data Write PLB Error\n");
+#else
+ if (val & MCSR_DB)
+ printf("Data PLB Error\n");
+#endif
if (val & MCSR_TLBP)
printf("TLB Parity Error\n");
if (val & MCSR_ICP){
generated by cgit v1.1 at 2024-12-18 21:20:24 +0000