[PATCH v8 3/4] MIPS: Octeon: Initialize and fixup device tree.

From: David Daney
Date: Wed Jun 06 2012 - 18:58:29 EST

From: David Daney <david.daney@xxxxxxxxxx>

If a compiled in device tree template is used, trim out unwanted parts
based on legacy platform probing.

Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
arch/mips/Kconfig | 2 +
arch/mips/cavium-octeon/Makefile | 3 +
arch/mips/cavium-octeon/octeon-platform.c | 523 ++++++++++++++++++++++++++++-
arch/mips/cavium-octeon/setup.c | 45 +++
4 files changed, 572 insertions(+), 1 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6d7e9b0..5988137 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1434,6 +1434,8 @@ config CPU_CAVIUM_OCTEON
select CPU_SUPPORTS_HIGHMEM
select CPU_SUPPORTS_HUGEPAGES
select ARCH_SPARSEMEM_ENABLE
+ select USE_OF
+ select LIBFDT
help
The Cavium Octeon processor is a highly integrated chip containing
many ethernet hardware widgets for networking tasks. The processor
diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile
index 1e37522..bc96e29 100644
--- a/arch/mips/cavium-octeon/Makefile
+++ b/arch/mips/cavium-octeon/Makefile
@@ -9,6 +9,9 @@
# Copyright (C) 2005-2009 Cavium Networks
#

+CFLAGS_octeon-platform.o = -I$(src)/../../../scripts/dtc/libfdt
+CFLAGS_setup.o = -I$(src)/../../../scripts/dtc/libfdt
+
obj-y := cpu.o setup.o serial.o octeon-platform.o octeon-irq.o csrc-octeon.o
obj-y += dma-octeon.o flash_setup.o
obj-y += octeon-memcpy.o
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index cd61d72..2754bc2 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2004-2010 Cavium Networks
+ * Copyright (C) 2004-2011 Cavium Networks
* Copyright (C) 2008 Wind River Systems
*/

@@ -13,10 +13,16 @@
#include <linux/usb.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_fdt.h>
+#include <linux/libfdt.h>

#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-rnm-defs.h>
+#include <asm/octeon/cvmx-helper.h>
+#include <asm/octeon/cvmx-helper-board.h>

static struct octeon_cf_data octeon_cf_data;

@@ -440,6 +446,521 @@ device_initcall(octeon_ohci_device_init);

#endif /* CONFIG_USB */

+static struct of_device_id __initdata octeon_ids[] = {
+ { .compatible = "simple-bus", },
+ { .compatible = "cavium,octeon-6335-uctl", },
+ { .compatible = "cavium,octeon-3860-bootbus", },
+ { .compatible = "cavium,mdio-mux", },
+ { .compatible = "gpio-leds", },
+ {},
+};
+
+static bool __init octeon_has_88e1145(void)
+{
+ return !OCTEON_IS_MODEL(OCTEON_CN52XX) &&
+ !OCTEON_IS_MODEL(OCTEON_CN6XXX) &&
+ !OCTEON_IS_MODEL(OCTEON_CN56XX);
+}
+
+static void __init octeon_fdt_set_phy(int eth, int phy_addr)
+{
+ const __be32 *phy_handle;
+ const __be32 *alt_phy_handle;
+ const __be32 *reg;
+ u32 phandle;
+ int phy;
+ int alt_phy;
+ const char *p;
+ int current_len;
+ char new_name[20];
+
+ phy_handle = fdt_getprop(initial_boot_params, eth, "phy-handle", NULL);
+ if (!phy_handle)
+ return;
+
+ phandle = be32_to_cpup(phy_handle);
+ phy = fdt_node_offset_by_phandle(initial_boot_params, phandle);
+
+ alt_phy_handle = fdt_getprop(initial_boot_params, eth, "cavium,alt-phy-handle", NULL);
+ if (alt_phy_handle) {
+ u32 alt_phandle = be32_to_cpup(alt_phy_handle);
+ alt_phy = fdt_node_offset_by_phandle(initial_boot_params, alt_phandle);
+ } else {
+ alt_phy = -1;
+ }
+
+ if (phy_addr < 0 || phy < 0) {
+ /* Delete the PHY things */
+ fdt_nop_property(initial_boot_params, eth, "phy-handle");
+ /* This one may fail */
+ fdt_nop_property(initial_boot_params, eth, "cavium,alt-phy-handle");
+ if (phy >= 0)
+ fdt_nop_node(initial_boot_params, phy);
+ if (alt_phy >= 0)
+ fdt_nop_node(initial_boot_params, alt_phy);
+ return;
+ }
+
+ if (phy_addr >= 256 && alt_phy > 0) {
+ const struct fdt_property *phy_prop;
+ struct fdt_property *alt_prop;
+ u32 phy_handle_name;
+
+ /* Use the alt phy node instead.*/
+ phy_prop = fdt_get_property(initial_boot_params, eth, "phy-handle", NULL);
+ phy_handle_name = phy_prop->nameoff;
+ fdt_nop_node(initial_boot_params, phy);
+ fdt_nop_property(initial_boot_params, eth, "phy-handle");
+ alt_prop = fdt_get_property_w(initial_boot_params, eth, "cavium,alt-phy-handle", NULL);
+ alt_prop->nameoff = phy_handle_name;
+ phy = alt_phy;
+ }
+
+ phy_addr &= 0xff;
+
+ if (octeon_has_88e1145()) {
+ fdt_nop_property(initial_boot_params, phy, "marvell,reg-init");
+ memset(new_name, 0, sizeof(new_name));
+ strcpy(new_name, "marvell,88e1145");
+ p = fdt_getprop(initial_boot_params, phy, "compatible",
+ &current_len);
+ if (p && current_len >= strlen(new_name))
+ fdt_setprop_inplace(initial_boot_params, phy,
+ "compatible", new_name, current_len);
+ }
+
+ reg = fdt_getprop(initial_boot_params, phy, "reg", NULL);
+ if (phy_addr == be32_to_cpup(reg))
+ return;
+
+ fdt_setprop_inplace_cell(initial_boot_params, phy, "reg", phy_addr);
+
+ snprintf(new_name, sizeof(new_name), "ethernet-phy@%x", phy_addr);
+
+ p = fdt_get_name(initial_boot_params, phy, &current_len);
+ if (p && current_len == strlen(new_name))
+ fdt_set_name(initial_boot_params, phy, new_name);
+ else
+ pr_err("Error: could not rename ethernet phy: <%s>", p);
+}
+
+static void __init octeon_fdt_set_mac_addr(int n, u64 *pmac)
+{
+ u8 new_mac[6];
+ u64 mac = *pmac;
+ int r;
+
+ new_mac[0] = (mac >> 40) & 0xff;
+ new_mac[1] = (mac >> 32) & 0xff;
+ new_mac[2] = (mac >> 24) & 0xff;
+ new_mac[3] = (mac >> 16) & 0xff;
+ new_mac[4] = (mac >> 8) & 0xff;
+ new_mac[5] = mac & 0xff;
+
+ r = fdt_setprop_inplace(initial_boot_params, n, "local-mac-address",
+ new_mac, sizeof(new_mac));
+
+ if (r) {
+ pr_err("Setting \"local-mac-address\" failed %d", r);
+ return;
+ }
+ *pmac = mac + 1;
+}
+
+static void __init octeon_fdt_rm_ethernet(int node)
+{
+ const __be32 *phy_handle;
+
+ phy_handle = fdt_getprop(initial_boot_params, node, "phy-handle", NULL);
+ if (phy_handle) {
+ u32 ph = be32_to_cpup(phy_handle);
+ int p = fdt_node_offset_by_phandle(initial_boot_params, ph);
+ if (p >= 0)
+ fdt_nop_node(initial_boot_params, p);
+ }
+ fdt_nop_node(initial_boot_params, node);
+}
+
+static void __init octeon_fdt_pip_port(int iface, int i, int p, int max, u64 *pmac)
+{
+ char name_buffer[20];
+ int eth;
+ int phy_addr;
+ int ipd_port;
+
+ snprintf(name_buffer, sizeof(name_buffer), "ethernet@%x", p);
+ eth = fdt_subnode_offset(initial_boot_params, iface, name_buffer);
+ if (eth < 0)
+ return;
+ if (p > max) {
+ pr_debug("Deleting port %x:%x\n", i, p);
+ octeon_fdt_rm_ethernet(eth);
+ return;
+ }
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ ipd_port = (0x100 * i) + (0x10 * p) + 0x800;
+ else
+ ipd_port = 16 * i + p;
+
+ phy_addr = cvmx_helper_board_get_mii_address(ipd_port);
+ octeon_fdt_set_phy(eth, phy_addr);
+ octeon_fdt_set_mac_addr(eth, pmac);
+}
+
+static void __init octeon_fdt_pip_iface(int pip, int idx, u64 *pmac)
+{
+ char name_buffer[20];
+ int iface;
+ int p;
+ int count;
+
+ count = cvmx_helper_interface_enumerate(idx);
+
+ snprintf(name_buffer, sizeof(name_buffer), "interface@%d", idx);
+ iface = fdt_subnode_offset(initial_boot_params, pip, name_buffer);
+ if (iface < 0)
+ return;
+
+ for (p = 0; p < 16; p++)
+ octeon_fdt_pip_port(iface, idx, p, count - 1, pmac);
+}
+
+int __init octeon_prune_device_tree(void)
+{
+ int i, max_port, uart_mask;
+ const char *pip_path;
+ const char *alias_prop;
+ char name_buffer[20];
+ int aliases;
+ u64 mac_addr_base;
+
+ if (fdt_check_header(initial_boot_params))
+ panic("Corrupt Device Tree.");
+
+ aliases = fdt_path_offset(initial_boot_params, "/aliases");
+ if (aliases < 0) {
+ pr_err("Error: No /aliases node in device tree.");
+ return -EINVAL;
+ }
+
+
+ mac_addr_base =
+ ((octeon_bootinfo->mac_addr_base[0] & 0xffull)) << 40 |
+ ((octeon_bootinfo->mac_addr_base[1] & 0xffull)) << 32 |
+ ((octeon_bootinfo->mac_addr_base[2] & 0xffull)) << 24 |
+ ((octeon_bootinfo->mac_addr_base[3] & 0xffull)) << 16 |
+ ((octeon_bootinfo->mac_addr_base[4] & 0xffull)) << 8 |
+ (octeon_bootinfo->mac_addr_base[5] & 0xffull);
+
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN63XX))
+ max_port = 2;
+ else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN68XX))
+ max_port = 1;
+ else
+ max_port = 0;
+
+ if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC10E)
+ max_port = 0;
+
+ for (i = 0; i < 2; i++) {
+ int mgmt;
+ snprintf(name_buffer, sizeof(name_buffer),
+ "mix%d", i);
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ name_buffer, NULL);
+ if (alias_prop) {
+ mgmt = fdt_path_offset(initial_boot_params, alias_prop);
+ if (mgmt < 0)
+ continue;
+ if (i >= max_port) {
+ pr_debug("Deleting mix%d\n", i);
+ octeon_fdt_rm_ethernet(mgmt);
+ fdt_nop_property(initial_boot_params, aliases,
+ name_buffer);
+ } else {
+ int phy_addr = cvmx_helper_board_get_mii_address(CVMX_HELPER_BOARD_MGMT_IPD_PORT + i);
+ octeon_fdt_set_phy(mgmt, phy_addr);
+ octeon_fdt_set_mac_addr(mgmt, &mac_addr_base);
+ }
+ }
+ }
+
+ pip_path = fdt_getprop(initial_boot_params, aliases, "pip", NULL);
+ if (pip_path) {
+ int pip = fdt_path_offset(initial_boot_params, pip_path);
+ if (pip >= 0)
+ for (i = 0; i <= 4; i++)
+ octeon_fdt_pip_iface(pip, i, &mac_addr_base);
+ }
+
+ /* I2C */
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN68XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN56XX))
+ max_port = 2;
+ else
+ max_port = 1;
+
+ for (i = 0; i < 2; i++) {
+ int i2c;
+ snprintf(name_buffer, sizeof(name_buffer),
+ "twsi%d", i);
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ name_buffer, NULL);
+
+ if (alias_prop) {
+ i2c = fdt_path_offset(initial_boot_params, alias_prop);
+ if (i2c < 0)
+ continue;
+ if (i >= max_port) {
+ pr_debug("Deleting twsi%d\n", i);
+ fdt_nop_node(initial_boot_params, i2c);
+ fdt_nop_property(initial_boot_params, aliases,
+ name_buffer);
+ }
+ }
+ }
+
+ /* SMI/MDIO */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ max_port = 4;
+ else if (OCTEON_IS_MODEL(OCTEON_CN52XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN56XX))
+ max_port = 2;
+ else
+ max_port = 1;
+
+ for (i = 0; i < 2; i++) {
+ int i2c;
+ snprintf(name_buffer, sizeof(name_buffer),
+ "smi%d", i);
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ name_buffer, NULL);
+
+ if (alias_prop) {
+ i2c = fdt_path_offset(initial_boot_params, alias_prop);
+ if (i2c < 0)
+ continue;
+ if (i >= max_port) {
+ pr_debug("Deleting smi%d\n", i);
+ fdt_nop_node(initial_boot_params, i2c);
+ fdt_nop_property(initial_boot_params, aliases,
+ name_buffer);
+ }
+ }
+ }
+
+ /* Serial */
+ uart_mask = 3;
+
+ /* Right now CN52XX is the only chip with a third uart */
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX))
+ uart_mask |= 4; /* uart2 */
+
+ for (i = 0; i < 3; i++) {
+ int uart;
+ snprintf(name_buffer, sizeof(name_buffer),
+ "uart%d", i);
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ name_buffer, NULL);
+
+ if (alias_prop) {
+ uart = fdt_path_offset(initial_boot_params, alias_prop);
+ if (uart_mask & (1 << i))
+ continue;
+ pr_debug("Deleting uart%d\n", i);
+ fdt_nop_node(initial_boot_params, uart);
+ fdt_nop_property(initial_boot_params, aliases,
+ name_buffer);
+ }
+ }
+
+ /* Compact Flash */
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ "cf0", NULL);
+ if (alias_prop) {
+ union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
+ unsigned long base_ptr, region_base, region_size;
+ unsigned long region1_base = 0;
+ unsigned long region1_size = 0;
+ int cs, bootbus;
+ bool is_16bit = false;
+ bool is_true_ide = false;
+ __be32 new_reg[6];
+ __be32 *ranges;
+ int len;
+
+ int cf = fdt_path_offset(initial_boot_params, alias_prop);
+ base_ptr = 0;
+ if (octeon_bootinfo->major_version == 1
+ && octeon_bootinfo->minor_version >= 1) {
+ if (octeon_bootinfo->compact_flash_common_base_addr)
+ base_ptr = octeon_bootinfo->compact_flash_common_base_addr;
+ } else {
+ base_ptr = 0x1d000800;
+ }
+
+ if (!base_ptr)
+ goto no_cf;
+
+ /* Find CS0 region. */
+ for (cs = 0; cs < 8; cs++) {
+ mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
+ region_base = mio_boot_reg_cfg.s.base << 16;
+ region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
+ if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
+ && base_ptr < region_base + region_size) {
+ is_16bit = mio_boot_reg_cfg.s.width;
+ break;
+ }
+ }
+ if (cs >= 7) {
+ /* cs and cs + 1 are CS0 and CS1, both must be less than 8. */
+ goto no_cf;
+ }
+
+ if (!(base_ptr & 0xfffful)) {
+ /*
+ * Boot loader signals availability of DMA (true_ide
+ * mode) by setting low order bits of base_ptr to
+ * zero.
+ */
+
+ /* Asume that CS1 immediately follows. */
+ mio_boot_reg_cfg.u64 =
+ cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs + 1));
+ region1_base = mio_boot_reg_cfg.s.base << 16;
+ region1_size = (mio_boot_reg_cfg.s.size + 1) << 16;
+ if (!mio_boot_reg_cfg.s.en)
+ goto no_cf;
+ is_true_ide = true;
+
+ } else {
+ fdt_nop_property(initial_boot_params, cf, "cavium,true-ide");
+ fdt_nop_property(initial_boot_params, cf, "cavium,dma-engine-handle");
+ if (!is_16bit) {
+ __be32 width = cpu_to_be32(8);
+ fdt_setprop_inplace(initial_boot_params, cf,
+ "cavium,bus-width", &width, sizeof(width));
+ }
+ }
+ new_reg[0] = cpu_to_be32(cs);
+ new_reg[1] = cpu_to_be32(0);
+ new_reg[2] = cpu_to_be32(0x10000);
+ new_reg[3] = cpu_to_be32(cs + 1);
+ new_reg[4] = cpu_to_be32(0);
+ new_reg[5] = cpu_to_be32(0x10000);
+ fdt_setprop_inplace(initial_boot_params, cf,
+ "reg", new_reg, sizeof(new_reg));
+
+ bootbus = fdt_parent_offset(initial_boot_params, cf);
+ if (bootbus < 0)
+ goto no_cf;
+ ranges = fdt_getprop_w(initial_boot_params, bootbus, "ranges", &len);
+ if (!ranges || len < (5 * 8 * sizeof(__be32)))
+ goto no_cf;
+
+ ranges[(cs * 5) + 2] = cpu_to_be32(region_base >> 32);
+ ranges[(cs * 5) + 3] = cpu_to_be32(region_base & 0xffffffff);
+ ranges[(cs * 5) + 4] = cpu_to_be32(region_size);
+ if (is_true_ide) {
+ cs++;
+ ranges[(cs * 5) + 2] = cpu_to_be32(region1_base >> 32);
+ ranges[(cs * 5) + 3] = cpu_to_be32(region1_base & 0xffffffff);
+ ranges[(cs * 5) + 4] = cpu_to_be32(region1_size);
+ }
+ goto end_cf;
+no_cf:
+ fdt_nop_node(initial_boot_params, cf);
+
+end_cf:
+ ;
+ }
+
+ /* 8 char LED */
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ "led0", NULL);
+ if (alias_prop) {
+ union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
+ unsigned long base_ptr, region_base, region_size;
+ int cs, bootbus;
+ __be32 new_reg[6];
+ __be32 *ranges;
+ int len;
+ int led = fdt_path_offset(initial_boot_params, alias_prop);
+
+ base_ptr = octeon_bootinfo->led_display_base_addr;
+ if (base_ptr == 0)
+ goto no_led;
+ /* Find CS0 region. */
+ for (cs = 0; cs < 8; cs++) {
+ mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(cs));
+ region_base = mio_boot_reg_cfg.s.base << 16;
+ region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
+ if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
+ && base_ptr < region_base + region_size)
+ break;
+ }
+
+ if (cs > 7)
+ goto no_led;
+
+ new_reg[0] = cpu_to_be32(cs);
+ new_reg[1] = cpu_to_be32(0x20);
+ new_reg[2] = cpu_to_be32(0x20);
+ new_reg[3] = cpu_to_be32(cs);
+ new_reg[4] = cpu_to_be32(0);
+ new_reg[5] = cpu_to_be32(0x20);
+ fdt_setprop_inplace(initial_boot_params, led,
+ "reg", new_reg, sizeof(new_reg));
+
+ bootbus = fdt_parent_offset(initial_boot_params, led);
+ if (bootbus < 0)
+ goto no_led;
+ ranges = fdt_getprop_w(initial_boot_params, bootbus, "ranges", &len);
+ if (!ranges || len < (5 * 8 * sizeof(__be32)))
+ goto no_led;
+
+ ranges[(cs * 5) + 2] = cpu_to_be32(region_base >> 32);
+ ranges[(cs * 5) + 3] = cpu_to_be32(region_base & 0xffffffff);
+ ranges[(cs * 5) + 4] = cpu_to_be32(region_size);
+ goto end_led;
+
+no_led:
+ fdt_nop_node(initial_boot_params, led);
+end_led:
+ ;
+ }
+
+ /* OHCI/UHCI USB */
+ alias_prop = fdt_getprop(initial_boot_params, aliases,
+ "uctl", NULL);
+ if (alias_prop) {
+ int uctl = fdt_path_offset(initial_boot_params, alias_prop);
+
+ if (uctl >= 0 && (!OCTEON_IS_MODEL(OCTEON_CN6XXX) ||
+ octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC2E)) {
+ pr_debug("Deleting uctl\n");
+ fdt_nop_node(initial_boot_params, uctl);
+ fdt_nop_property(initial_boot_params, aliases, "uctl");
+ } else if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC10E ||
+ octeon_bootinfo->board_type == CVMX_BOARD_TYPE_NIC4E) {
+ /* Missing "refclk-type" defaults to crystal. */
+ fdt_nop_property(initial_boot_params, uctl, "refclk-type");
+ }
+ }
+
+ return 0;
+}
+
+static int __init octeon_publish_devices(void)
+{
+ return of_platform_bus_probe(NULL, octeon_ids, NULL);
+}
+device_initcall(octeon_publish_devices);
+
MODULE_AUTHOR("David Daney <ddaney@xxxxxxxxxxxxxxxxxx>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Platform driver for Octeon SOC");
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 260dc24..919b0fb 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -21,6 +21,8 @@
#include <linux/platform_device.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
+#include <linux/of_fdt.h>
+#include <linux/libfdt.h>

#include <asm/processor.h>
#include <asm/reboot.h>
@@ -775,3 +777,46 @@ void prom_free_prom_memory(void)
}
#endif
}
+
+int octeon_prune_device_tree(void);
+
+extern const char __dtb_octeon_3xxx_begin;
+extern const char __dtb_octeon_3xxx_end;
+extern const char __dtb_octeon_68xx_begin;
+extern const char __dtb_octeon_68xx_end;
+void __init device_tree_init(void)
+{
+ int dt_size;
+ struct boot_param_header *fdt;
+ bool do_prune;
+
+ if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
+ fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
+ if (fdt_check_header(fdt))
+ panic("Corrupt Device Tree passed to kernel.");
+ dt_size = be32_to_cpu(fdt->totalsize);
+ do_prune = false;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
+ fdt = (struct boot_param_header *)&__dtb_octeon_68xx_begin;
+ dt_size = &__dtb_octeon_68xx_end - &__dtb_octeon_68xx_begin;
+ do_prune = true;
+ } else {
+ fdt = (struct boot_param_header *)&__dtb_octeon_3xxx_begin;
+ dt_size = &__dtb_octeon_3xxx_end - &__dtb_octeon_3xxx_begin;
+ do_prune = true;
+ }
+
+ /* Copy the default tree from init memory. */
+ initial_boot_params = early_init_dt_alloc_memory_arch(dt_size, 8);
+ if (initial_boot_params == NULL)
+ panic("Could not allocate initial_boot_params\n");
+ memcpy(initial_boot_params, fdt, dt_size);
+
+ if (do_prune) {
+ octeon_prune_device_tree();
+ pr_info("Using internal Device Tree.\n");
+ } else {
+ pr_info("Using passed Device Tree.\n");
+ }
+ unflatten_device_tree();
+}
--
1.7.2.3

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