Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / nand_spl / nand_boot_fsl_elbc.c

diff --git a/qemu/roms/u-boot/nand_spl/nand_boot_fsl_elbc.c b/qemu/roms/u-boot/nand_spl/nand_boot_fsl_elbc.c
new file mode 100644 (file)
index 0000000..1afa1a2
--- /dev/null
+++ b/qemu/roms/u-boot/nand_spl/nand_boot_fsl_elbc.c
@@ -0,0 +1,142 @@
+/*
+ * NAND boot for Freescale Enhanced Local Bus Controller, Flash Control Machine
+ *
+ * (C) Copyright 2006-2008
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * Copyright (c) 2008 Freescale Semiconductor, Inc.
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/fsl_lbc.h>
+#include <linux/mtd/nand.h>
+
+#define WINDOW_SIZE 8192
+
+static void nand_wait(void)
+{
+       fsl_lbc_t *regs = LBC_BASE_ADDR;
+
+       for (;;) {
+               uint32_t status = in_be32(&regs->ltesr);
+
+               if (status == 1)
+                       return;
+
+               if (status & 1) {
+                       puts("read failed (ltesr)\n");
+                       for (;;);
+               }
+       }
+}
+
+static void nand_load(unsigned int offs, int uboot_size, uchar *dst)
+{
+       fsl_lbc_t *regs = LBC_BASE_ADDR;
+       uchar *buf = (uchar *)CONFIG_SYS_NAND_BASE;
+       const int large = CONFIG_SYS_NAND_OR_PRELIM & OR_FCM_PGS;
+       const int block_shift = large ? 17 : 14;
+       const int block_size = 1 << block_shift;
+       const int page_size = large ? 2048 : 512;
+       const int bad_marker = large ? page_size + 0 : page_size + 5;
+       int fmr = (15 << FMR_CWTO_SHIFT) | (2 << FMR_AL_SHIFT) | 2;
+       int pos = 0;
+
+       if (offs & (block_size - 1)) {
+               puts("bad offset\n");
+               for (;;);
+       }
+
+       if (large) {
+               fmr |= FMR_ECCM;
+               __raw_writel((NAND_CMD_READ0 << FCR_CMD0_SHIFT) |
+                       (NAND_CMD_READSTART << FCR_CMD1_SHIFT),
+                       &regs->fcr);
+               __raw_writel(
+                       (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+                       (FIR_OP_CA  << FIR_OP1_SHIFT) |
+                       (FIR_OP_PA  << FIR_OP2_SHIFT) |
+                       (FIR_OP_CW1 << FIR_OP3_SHIFT) |
+                       (FIR_OP_RBW << FIR_OP4_SHIFT),
+                       &regs->fir);
+       } else {
+               __raw_writel(NAND_CMD_READ0 << FCR_CMD0_SHIFT, &regs->fcr);
+               __raw_writel(
+                       (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+                       (FIR_OP_CA  << FIR_OP1_SHIFT) |
+                       (FIR_OP_PA  << FIR_OP2_SHIFT) |
+                       (FIR_OP_RBW << FIR_OP3_SHIFT),
+                       &regs->fir);
+       }
+
+       __raw_writel(0, &regs->fbcr);
+
+       while (pos < uboot_size) {
+               int i = 0;
+               __raw_writel(offs >> block_shift, &regs->fbar);
+
+               do {
+                       int j;
+                       unsigned int page_offs = (offs & (block_size - 1)) << 1;
+
+                       __raw_writel(~0, &regs->ltesr);
+                       __raw_writel(0, &regs->lteatr);
+                       __raw_writel(page_offs, &regs->fpar);
+                       __raw_writel(fmr, &regs->fmr);
+                       sync();
+                       __raw_writel(0, &regs->lsor);
+                       nand_wait();
+
+                       page_offs %= WINDOW_SIZE;
+
+                       /*
+                        * If either of the first two pages are marked bad,
+                        * continue to the next block.
+                        */
+                       if (i++ < 2 && buf[page_offs + bad_marker] != 0xff) {
+                               puts("skipping\n");
+                               offs = (offs + block_size) & ~(block_size - 1);
+                               pos &= ~(block_size - 1);
+                               break;
+                       }
+
+                       for (j = 0; j < page_size; j++)
+                               dst[pos + j] = buf[page_offs + j];
+
+                       pos += page_size;
+                       offs += page_size;
+               } while ((offs & (block_size - 1)) && (pos < uboot_size));
+       }
+}
+
+/*
+ * The main entry for NAND booting. It's necessary that SDRAM is already
+ * configured and available since this code loads the main U-Boot image
+ * from NAND into SDRAM and starts it from there.
+ */
+void nand_boot(void)
+{
+       __attribute__((noreturn)) void (*uboot)(void);
+
+       /*
+        * Load U-Boot image from NAND into RAM
+        */
+       nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
+                 (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
+
+       /*
+        * Jump to U-Boot image
+        */
+       puts("transfering control\n");
+       /*
+        * Clean d-cache and invalidate i-cache, to
+        * make sure that no stale data is executed.
+        */
+       flush_cache(CONFIG_SYS_NAND_U_BOOT_DST, CONFIG_SYS_NAND_U_BOOT_SIZE);
+       uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
+       uboot();
+}