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authorStefan Reinauer <stefan.reinauer@coreboot.org>2012-12-07 17:18:43 -0800
committerRonald G. Minnich <rminnich@gmail.com>2012-12-08 06:48:03 +0100
commit9fe20cb3814df88f181648860102a9da249a4da1 (patch)
tree3623451d939c151754dcec0e4f87ec27b5a44614 /src/cpu/samsung/exynos5-common
parent747127d50545c1fbd0dcc10baacc742d3151ddfe (diff)
WIP: Initial support for Samsung Exynos 5250 ARM CPU
Samsung SoC files, including Exynos5 (a Cortex-A15 implementation). Since this is an SoC we'll forego the x86-style {north,south}bridge and cpu distinction. We may try to split some stuff out before the final version if prudent. Change-Id: Ie068e9dc3dd836c83d90e282b10d5202e7a4ba9b Signed-off-by: David Hendricks <dhendrix@chromium.org> Signed-off-by: Stefan Reinauer <reinauer@google.com> Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/2005 Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/cpu/samsung/exynos5-common')
-rw-r--r--src/cpu/samsung/exynos5-common/Makefile.inc2
-rw-r--r--src/cpu/samsung/exynos5-common/soc.c30
-rw-r--r--src/cpu/samsung/exynos5-common/spl_boot.c460
3 files changed, 492 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5-common/Makefile.inc b/src/cpu/samsung/exynos5-common/Makefile.inc
new file mode 100644
index 0000000000..cad6cb3de7
--- /dev/null
+++ b/src/cpu/samsung/exynos5-common/Makefile.inc
@@ -0,0 +1,2 @@
+#romstage-y += soc.c
+romstage-y += spl_boot.c
diff --git a/src/cpu/samsung/exynos5-common/soc.c b/src/cpu/samsung/exynos5-common/soc.c
new file mode 100644
index 0000000000..e73fd338ba
--- /dev/null
+++ b/src/cpu/samsung/exynos5-common/soc.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2010 Samsung Electronics.
+ * Minkyu Kang <mk7.kang@samsung.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 be 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
+ */
+
+#include <common.h>
+#include <arch/io.h>
+
+void reset_cpu(unsigned long addr)
+{
+ writel(0x1, samsung_get_base_swreset());
+}
diff --git a/src/cpu/samsung/exynos5-common/spl_boot.c b/src/cpu/samsung/exynos5-common/spl_boot.c
new file mode 100644
index 0000000000..8ae051171e
--- /dev/null
+++ b/src/cpu/samsung/exynos5-common/spl_boot.c
@@ -0,0 +1,460 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * 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 be 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
+ */
+
+/* FIXME(dhendrix): pulled in a lot of extra crap such as partition and string
+ libs*/
+#include <assert.h>
+#include <common.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <console/console.h>
+#include <console/loglevel.h>
+//#include <asm/arch/board.h>
+
+#include <config.h>
+#include <spi.h>
+#if 0
+#include <asm/arch/clock.h>
+#include <asm/arch-exynos/spi.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/power.h>
+#endif
+#include <arch/hlt.h>
+#include <cpu/samsung/exynos5250/clk.h>
+#include <cpu/samsung/exynos5250/cpu.h>
+#include <cpu/samsung/exynos5250/periph.h>
+#include <cpu/samsung/exynos5250/pinmux.h>
+#include <cpu/samsung/exynos5250/power.h>
+#include <cpu/samsung/exynos5250/spi.h>
+
+#include <cpu/samsung/exynos5-common/cpu.h>
+#include <cpu/samsung/exynos5-common/exynos5-common.h>
+
+//#include <asm/system.h>
+#include <system.h>
+
+#include <arch/io.h>
+#include <arch/types.h>
+
+/* FIXME(dhendrix): clean out u-boot global data stuff */
+//DECLARE_GLOBAL_DATA_PTR;
+
+#define OM_STAT (0x1f << 1)
+
+/**
+ * Copy data from SD or MMC device to RAM.
+ *
+ * @param offset Block offset of the data
+ * @param nblock Number of blocks
+ * @param dst Destination address
+ * @return 1 = True or 0 = False
+ */
+typedef u32 (*mmc_copy_func_t)(u32 offset, u32 nblock, u32 dst);
+
+/**
+ * Copy data from SPI flash to RAM.
+ *
+ * @param offset Block offset of the data
+ * @param nblock Number of blocks
+ * @param dst Destination address
+ * @return 1 = True or 0 = False
+ */
+typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst);
+
+
+/**
+ * Copy data through USB.
+ *
+ * @return 1 = True or 0 = False
+ */
+typedef u32 (*usb_copy_func_t)(void);
+
+/*
+ * Set/clear program flow prediction and return the previous state.
+ */
+static int config_branch_prediction(int set_cr_z)
+{
+ unsigned int cr;
+
+ /* System Control Register: 11th bit Z Branch prediction enable */
+ cr = get_cr();
+ set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
+
+ return cr & CR_Z;
+}
+
+#if 0
+static void spi_rx_tx(struct exynos_spi *regs, int todo,
+ void *dinp, void const *doutp, int i)
+{
+ uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
+ int rx_lvl, tx_lvl;
+ uint out_bytes, in_bytes;
+
+ out_bytes = in_bytes = todo;
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+
+ while (in_bytes) {
+ uint32_t spi_sts;
+ int temp;
+
+ spi_sts = readl(&regs->spi_sts);
+ rx_lvl = ((spi_sts >> 15) & 0x7f);
+ tx_lvl = ((spi_sts >> 6) & 0x7f);
+ while (tx_lvl < 32 && out_bytes) {
+ temp = 0xffffffff;
+ writel(temp, &regs->tx_data);
+ out_bytes -= 4;
+ tx_lvl += 4;
+ }
+ while (rx_lvl >= 4 && in_bytes) {
+ temp = readl(&regs->rx_data);
+ if (rxp)
+ *rxp++ = temp;
+ in_bytes -= 4;
+ rx_lvl -= 4;
+ }
+ }
+}
+#endif
+
+/* FIXME(dhendrix): feels like exynos_spi_copy should go somewhere else... */
+#if 0
+/**
+ * Copy uboot from spi flash to RAM
+ *
+ * @parma uboot_size size of u-boot to copy
+ */
+static void exynos_spi_copy(unsigned int uboot_size)
+{
+ int upto, todo;
+ int i;
+// struct exynos_spi *regs = (struct exynos_spi *)samsung_get_base_spi1();
+ struct exynos_spi *regs = (struct exynos_spi *)0x12d30000;
+
+ clock_set_rate(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
+ /* set the spi1 GPIO */
+ exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
+
+ /* set pktcnt and enable it */
+ writel(4 | SPI_PACKET_CNT_EN, &regs->pkt_cnt);
+ /* set FB_CLK_SEL */
+ writel(SPI_FB_DELAY_180, &regs->fb_clk);
+ /* set CH_WIDTH and BUS_WIDTH as word */
+ setbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
+
+ /* clear rx and tx channel if set priveously */
+ clrbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
+
+ setbits_le32(&regs->swap_cfg, SPI_RX_SWAP_EN |
+ SPI_RX_BYTE_SWAP |
+ SPI_RX_HWORD_SWAP);
+
+ /* do a soft reset */
+ setbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+
+ /* now set rx and tx channel ON */
+ setbits_le32(&regs->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
+ clrbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
+
+ /* Send read instruction (0x3h) followed by a 24 bit addr */
+ writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, &regs->tx_data);
+
+ /* waiting for TX done */
+ while (!(readl(&regs->spi_sts) & SPI_ST_TX_DONE));
+
+ for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
+ todo = MIN(uboot_size - upto, (1 << 15));
+ spi_rx_tx(regs, todo, (void *)(CONFIG_SYS_TEXT_BASE),
+ (void *)(SPI_FLASH_UBOOT_POS), i);
+ }
+
+ setbits_le32(&regs->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
+
+ /*
+ * Let put controller mode to BYTE as
+ * SPI driver does not support WORD mode yet
+ */
+ clrbits_le32(&regs->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ writel(0, &regs->swap_cfg);
+
+ /*
+ * Flush spi tx, rx fifos and reset the SPI controller
+ * and clear rx/tx channel
+ */
+ clrsetbits_le32(&regs->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_CH_RST);
+ clrbits_le32(&regs->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
+}
+#endif
+
+/* Copy U-Boot image to RAM */
+static void copy_uboot_to_ram(void)
+{
+ unsigned int sec_boot_check;
+ unsigned int uboot_size = CONFIG_COREBOOT_ROMSIZE_KB_4096;
+ int is_cr_z_set;
+ enum boot_mode boot_mode = BOOT_MODE_OM;
+ mmc_copy_func_t mmc_copy;
+
+ usb_copy_func_t usb_copy;
+
+#if 0
+ uboot_size = exynos_get_uboot_size();
+ boot_mode = exynos_get_boot_device();
+#endif
+
+ if (boot_mode == BOOT_MODE_OM) {
+ /* Read iRAM location to check for secondary USB boot mode */
+ sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
+ if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
+ boot_mode = BOOT_MODE_USB;
+ }
+ debug("U-Boot size %u\n", uboot_size);
+
+ if (boot_mode == BOOT_MODE_OM)
+ boot_mode = readl(EXYNOS_POWER_BASE) & OM_STAT;
+
+ switch (boot_mode) {
+#if defined(CONFIG_EXYNOS_SPI_BOOT)
+ case BOOT_MODE_SERIAL:
+ /* let us our own function to copy u-boot from SF */
+ exynos_spi_copy(uboot_size);
+ break;
+#endif
+ case BOOT_MODE_MMC:
+ mmc_copy = *(mmc_copy_func_t *)EXYNOS_COPY_MMC_FNPTR_ADDR;
+ assert(!(uboot_size & 511));
+ mmc_copy(BL2_START_OFFSET, uboot_size / 512,
+ CONFIG_SYS_TEXT_BASE);
+ break;
+ case BOOT_MODE_USB:
+ /*
+ * iROM needs program flow prediction to be disabled
+ * before copy from USB device to RAM
+ */
+ is_cr_z_set = config_branch_prediction(0);
+ usb_copy = *(usb_copy_func_t *)
+ EXYNOS_COPY_USB_FNPTR_ADDR;
+ usb_copy();
+ config_branch_prediction(is_cr_z_set);
+ break;
+ default:
+ printk(BIOS_ERR, "Invalid boot mode selection\n");
+ hlt();
+ break;
+ }
+ debug("U-Boot copied\n");
+}
+
+#if 0
+/**
+ * Set up the U-Boot global_data pointer
+ *
+ * This sets the address of the global data, and sets up basic values.
+ *
+ * @param gdp Value to give to gd
+ */
+static void setup_global_data(gd_t *gdp)
+{
+ gd = gdp;
+ memzero((void *)gd, sizeof(gd_t));
+ gd->flags |= GD_FLG_RELOC;
+ gd->baudrate = CONFIG_BAUDRATE;
+ gd->have_console = 1;
+}
+#endif
+
+#if 0
+/* Tell the loaded U-Boot that it was loaded from SPL */
+static void exynos5_set_spl_marker(void)
+{
+ uint32_t *marker = (uint32_t *)CONFIG_SPL_MARKER;
+
+ *marker = EXYNOS5_SPL_MARKER;
+}
+#endif
+
+/* Board-specific call to see if wakeup is allowed. */
+static int __def_board_wakeup_permitted(void)
+{
+ return 1;
+}
+int board_wakeup_permitted(void)
+ __attribute__((weak, alias("__def_board_wakeup_permitted")));
+
+void board_init_f(unsigned long bootflag)
+{
+ /*
+ * The gd struct is only needed for serial initialization. Since this
+ * function is called in SPL u-boot. We store the gd struct in the
+ * stack instead of the default memory region which may not be
+ * initialized.
+ */
+// __attribute__((aligned(8))) gd_t local_gd;
+// __attribute__((noreturn)) void (*uboot)(void);
+
+// exynos5_set_spl_marker();
+// setup_global_data(&local_gd);
+
+ /*
+ * Init subsystems, and resume if required. For a normal boot this
+ * will set up the UART and display a message.
+ */
+ if (lowlevel_init_subsystems()) {
+ if (!board_wakeup_permitted())
+ power_reset();
+ power_exit_wakeup();
+ }
+
+// printk(BIOS_INFO, "\n\nU-Boot SPL, board rev %u\n", board_get_revision());
+
+ copy_uboot_to_ram();
+ /* Jump to U-Boot image */
+// uboot = (void *)CONFIG_SYS_TEXT_BASE;
+// uboot();
+ /* Never returns Here */
+// printk(BIOS_ERR, "%s: u-boot jump failed", __func__);
+ printk(BIOS_INFO, "%s: we should not be here...", __func__);
+ hlt();
+}
+
+/* Place Holders */
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+ /* Function attribute is no-return */
+ /* This Function never executes */
+ while (1)
+ ;
+}
+
+//void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}
+
+#if 0
+/*
+ * The following functions are required when linking console library to SPL.
+ *
+ * Enabling UART in SPL u-boot requires console library. But some
+ * functions we needed in the console library depends on a bunch
+ * of library in libgeneric, like lib/ctype.o, lib/div64.o, lib/string.o,
+ * and lib/vsprintf.o. Adding them makes the SPL u-boot too large and not
+ * fit into the expected size.
+ *
+ * So we mock these functions in SPL, i.e. vsprintf(), panic(), etc.,
+ * in order to cut its dependency.
+ */
+int vsprintf(char *buf, const char *fmt, va_list args)
+{
+ char *str = buf, *s;
+ ulong u;
+
+ /*
+ * We won't implement all full functions of vsprintf().
+ * We only implement %s and %u, and ignore others and directly use
+ * the original format string as its result.
+ */
+
+ while (*fmt) {
+ if (*fmt != '%') {
+ *str++ = *fmt++;
+ continue;
+ }
+ fmt++;
+ switch (*fmt) {
+ case '%':
+ *str++ = *fmt++;
+ break;
+ case 's':
+ fmt++;
+ s = va_arg(args, char *);
+ while (*s)
+ *str++ = *s++;
+ break;
+ case 'u':
+ fmt++;
+ u = va_arg(args, ulong);
+ s = simple_itoa(u);
+ while (*s)
+ *str++ = *s++;
+ break;
+ default:
+ /* Print the original string for unsupported formats */
+ *str++ = '%';
+ *str++ = *fmt++;
+ }
+ }
+ *str = '\0';
+ return str - buf;
+}
+#endif
+
+#if 0
+void panic(const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ vprintf(fmt, args);
+ putc('\n');
+ va_end(args);
+#if defined(CONFIG_PANIC_HANG)
+ hang();
+#else
+ udelay(100000); /* allow messages to go out */
+ do_reset(NULL, 0, 0, NULL);
+#endif
+ while (1)
+ ;
+}
+#endif
+
+#if 0
+void __assert_fail(const char *assertion, const char *file, unsigned line,
+ const char *function)
+{
+ /* This will not return */
+ panic("%s:%u: %s: Assertion `%s' failed.", file, line, function,
+ assertion);
+}
+#endif
+
+#if 0
+char *simple_itoa(ulong i)
+{
+ /* 21 digits plus null terminator, good for 64-bit or smaller ints */
+ static char local[22] __attribute__((section(".data")));
+ char *p = &local[21];
+
+ *p-- = '\0';
+ do {
+ *p-- = '0' + i % 10;
+ i /= 10;
+ } while (i > 0);
+ return p + 1;
+}
+#endif