Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

1 files changed, 185 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/ppc4xx/ecc.c b/arch/powerpc/cpu/ppc4xx/ecc.c
new file mode 100644
index 0000000..f105605
--- /dev/null
+++ b/arch/powerpc/cpu/ppc4xx/ecc.c
@@ -0,0 +1,185 @@
+/*
+ *    Copyright (c) 2008 Nuovation System Designs, LLC
+ *      Grant Erickson <gerickson@nuovations.com>
+ *
+ *    (C) Copyright 2005-2009
+ *    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 <asm/mmu.h>
+#include <asm/cache.h>
+
+#include "ecc.h"
+
+#if defined(CONFIG_SDRAM_PPC4xx_IBM_DDR) || \
+    defined(CONFIG_SDRAM_PPC4xx_IBM_DDR2)
+#if defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC)
+
+#if defined(CONFIG_405EX)
+/*
+ * Currently only 405EX uses 16bit data bus width as an alternative
+ * option to 32bit data width (SDRAM0_MCOPT1_WDTH)
+ */
+#define SDRAM_DATA_ALT_WIDTH	2
+#else
+#define SDRAM_DATA_ALT_WIDTH	8
+#endif
+
+static void wait_ddr_idle(void)
+{
+	u32 val;
+
+	do {
+		mfsdram(SDRAM_MCSTAT, val);
+	} while ((val & SDRAM_MCSTAT_IDLE_MASK) == SDRAM_MCSTAT_IDLE_NOT);
+}
+
+static void program_ecc_addr(unsigned long start_address,
+			     unsigned long num_bytes,
+			     unsigned long tlb_word2_i_value)
+{
+	unsigned long current_address;
+	unsigned long end_address;
+	unsigned long address_increment;
+	unsigned long mcopt1;
+	char str[] = "ECC generation -";
+	char slash[] = "\\|/-\\|/-";
+	int loop = 0;
+	int loopi = 0;
+
+	current_address = start_address;
+	mfsdram(SDRAM_MCOPT1, mcopt1);
+	if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
+		mtsdram(SDRAM_MCOPT1,
+			(mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_GEN);
+		sync();
+		eieio();
+		wait_ddr_idle();
+
+		puts(str);
+
+#ifdef CONFIG_440
+		if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) {
+#endif
+			/* ECC bit set method for non-cached memory */
+			if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) == SDRAM_MCOPT1_DMWD_32)
+				address_increment = 4;
+			else
+				address_increment = SDRAM_DATA_ALT_WIDTH;
+			end_address = current_address + num_bytes;
+
+			while (current_address < end_address) {
+				*((unsigned long *)current_address) = 0;
+				current_address += address_increment;
+
+				if ((loop++ % (2 << 20)) == 0) {
+					putc('\b');
+					putc(slash[loopi++ % 8]);
+				}
+			}
+#ifdef CONFIG_440
+		} else {
+			/* ECC bit set method for cached memory */
+			dcbz_area(start_address, num_bytes);
+			/* Write modified dcache lines back to memory */
+			clean_dcache_range(start_address, start_address + num_bytes);
+		}
+#endif /* CONFIG_440 */
+
+		blank_string(strlen(str));
+
+		sync();
+		eieio();
+		wait_ddr_idle();
+
+		/* clear ECC error repoting registers */
+		mtsdram(SDRAM_ECCES, 0xffffffff);
+		mtdcr(0x4c, 0xffffffff);
+
+		mtsdram(SDRAM_MCOPT1,
+			(mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) | SDRAM_MCOPT1_MCHK_CHK_REP);
+		sync();
+		eieio();
+		wait_ddr_idle();
+	}
+}
+
+#if defined(CONFIG_SDRAM_PPC4xx_IBM_DDR)
+void ecc_init(unsigned long * const start, unsigned long size)
+{
+	/*
+	 * Init ECC with cache disabled (on PPC's with IBM DDR
+	 * controller (non DDR2), not tested with cache enabled yet
+	 */
+	program_ecc_addr((u32)start, size, TLB_WORD2_I_ENABLE);
+}
+#endif
+
+#if defined(CONFIG_SDRAM_PPC4xx_IBM_DDR2)
+void do_program_ecc(unsigned long tlb_word2_i_value)
+{
+	unsigned long mcopt1;
+	unsigned long mcopt2;
+	unsigned long mcstat;
+	phys_size_t memsize = sdram_memsize();
+
+	if (memsize > CONFIG_MAX_MEM_MAPPED) {
+		printf("\nWarning: Can't enable ECC on systems with more than 2GB of SDRAM!\n");
+		return;
+	}
+
+	mfsdram(SDRAM_MCOPT1, mcopt1);
+	mfsdram(SDRAM_MCOPT2, mcopt2);
+
+	if ((mcopt1 & SDRAM_MCOPT1_MCHK_MASK) != SDRAM_MCOPT1_MCHK_NON) {
+		/* DDR controller must be enabled and not in self-refresh. */
+		mfsdram(SDRAM_MCSTAT, mcstat);
+		if (((mcopt2 & SDRAM_MCOPT2_DCEN_MASK) == SDRAM_MCOPT2_DCEN_ENABLE)
+		    && ((mcopt2 & SDRAM_MCOPT2_SREN_MASK) == SDRAM_MCOPT2_SREN_EXIT)
+		    && ((mcstat & (SDRAM_MCSTAT_MIC_MASK | SDRAM_MCSTAT_SRMS_MASK))
+			== (SDRAM_MCSTAT_MIC_COMP | SDRAM_MCSTAT_SRMS_NOT_SF))) {
+
+			program_ecc_addr(0, memsize, tlb_word2_i_value);
+		}
+	}
+}
+#endif
+
+#endif /* defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC) */
+#endif /* defined(CONFIG_SDRAM_PPC4xx_IBM_DDR)... */