Unstable 440EPx operation due to default bootsrtap options settings.
The 440EPx fixed bootstrap options A,B,C,D sets PLL FWDVA
to a value 1 that results PLLOUTB being greater than the CPU clock
frequency. This results unstable 440EPx operation causing hang
conditions.
This is a patch fixing this problem. The patch touches two files
speed.c and cpu_init.c.
Signed off by Rupjyoti Sarmah < rsar...@amcc.com > from Applied Micro
------------------------------
diff -uNr u-boot-2009.06/cpu/ppc4xx/cpu_init.c
u-boot-2009.06.1/cpu/ppc4xx/cpu_init.c
--- u-boot-2009.06/cpu/ppc4xx/cpu_init.c 2009-06-14 12:30:39.000000000 -0700
+++ u-boot-2009.06.1/cpu/ppc4xx/cpu_init.c 2009-04-30 11:00:40.000000000 -0700
@@ -1,337 +1,462 @@
-/*
- * (C) Copyright 2000-2007
- * Wolfgang Denk, DENX Software Engineering, w...@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 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 <watchdog.h>
-#include <ppc4xx_enet.h>
-#include <asm/processor.h>
-#include <asm/gpio.h>
-#include <ppc4xx.h>
-
-#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
-DECLARE_GLOBAL_DATA_PTR;
-#endif
-
-#ifndef CONFIG_SYS_PLL_RECONFIG
-#define CONFIG_SYS_PLL_RECONFIG 0
-#endif
-
-void reconfigure_pll(u32 new_cpu_freq)
-{
-#if defined(CONFIG_440EPX)
- int reset_needed = 0;
- u32 reg, temp;
- u32 prbdv0, target_prbdv0, /* CLK_PRIMBD */
- fwdva, target_fwdva, fwdvb, target_fwdvb, /* CLK_PLLD */
- fbdv, target_fbdv, lfbdv, target_lfbdv,
- perdv0, target_perdv0, /* CLK_PERD */
- spcid0, target_spcid0; /* CLK_SPCID */
-
- /* Reconfigure clocks if necessary.
- * See PPC440EPx User's Manual, sections 8.2 and 14 */
- if (new_cpu_freq == 667) {
- target_prbdv0 = 2;
- target_fwdva = 2;
- target_fwdvb = 4;
- target_fbdv = 20;
- target_lfbdv = 1;
- target_perdv0 = 4;
- target_spcid0 = 4;
-
- mfcpr(clk_primbd, reg);
- temp = (reg & PRBDV_MASK) >> 24;
- prbdv0 = temp ? temp : 8;
- if (prbdv0 != target_prbdv0) {
- reg &= ~PRBDV_MASK;
- reg |= ((target_prbdv0 == 8 ? 0 : target_prbdv0) << 24);
- mtcpr(clk_primbd, reg);
- reset_needed = 1;
- }
-
- mfcpr(clk_plld, reg);
-
- temp = (reg & PLLD_FWDVA_MASK) >> 16;
- fwdva = temp ? temp : 16;
-
- temp = (reg & PLLD_FWDVB_MASK) >> 8;
- fwdvb = temp ? temp : 8;
-
- temp = (reg & PLLD_FBDV_MASK) >> 24;
- fbdv = temp ? temp : 32;
-
- temp = (reg & PLLD_LFBDV_MASK);
- lfbdv = temp ? temp : 64;
-
- if (fwdva != target_fwdva || fbdv != target_fbdv || lfbdv != target_lfbdv) {
- reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
- PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
- reg |= ((target_fwdva == 16 ? 0 : target_fwdva) << 16) |
- ((target_fwdvb == 8 ? 0 : target_fwdvb) << 8) |
- ((target_fbdv == 32 ? 0 : target_fbdv) << 24) |
- (target_lfbdv == 64 ? 0 : target_lfbdv);
- mtcpr(clk_plld, reg);
- reset_needed = 1;
- }
-
- mfcpr(clk_perd, reg);
- perdv0 = (reg & CPR0_PERD_PERDV0_MASK) >> 24;
- if (perdv0 != target_perdv0) {
- reg &= ~CPR0_PERD_PERDV0_MASK;
- reg |= (target_perdv0 << 24);
- mtcpr(clk_perd, reg);
- reset_needed = 1;
- }
-
- mfcpr(clk_spcid, reg);
- temp = (reg & CPR0_SPCID_SPCIDV0_MASK) >> 24;
- spcid0 = temp ? temp : 4;
- if (spcid0 != target_spcid0) {
- reg &= ~CPR0_SPCID_SPCIDV0_MASK;
- reg |= ((target_spcid0 == 4 ? 0 : target_spcid0) << 24);
- mtcpr(clk_spcid, reg);
- reset_needed = 1;
- }
-
- /* Set reload inhibit so configuration will persist across
- * processor resets */
- mfcpr(clk_icfg, reg);
- reg &= ~CPR0_ICFG_RLI_MASK;
- reg |= 1 << 31;
- mtcpr(clk_icfg, reg);
- }
-
- /* Reset processor if configuration changed */
- if (reset_needed) {
- __asm__ __volatile__ ("sync; isync");
- mtspr(dbcr0, 0x20000000);
- }
-#endif
-}
-
-/*
- * Breath some life into the CPU...
- *
- * Reconfigure PLL if necessary,
- * set up the memory map,
- * initialize a bunch of registers
- */
-void
-cpu_init_f (void)
-{
-#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
- u32 val;
-#endif
-
- reconfigure_pll(CONFIG_SYS_PLL_RECONFIG);
-
-#if (defined(CONFIG_405EP) || defined (CONFIG_405EX)) &&
!defined(CONFIG_SYS_4xx_GPIO_TABLE)
- /*
- * GPIO0 setup (select GPIO or alternate function)
- */
-#if defined(CONFIG_SYS_GPIO0_OR)
- out32(GPIO0_OR, CONFIG_SYS_GPIO0_OR); /* set initial state of output pins */
-#endif
-#if defined(CONFIG_SYS_GPIO0_ODR)
- out32(GPIO0_ODR, CONFIG_SYS_GPIO0_ODR); /* open-drain select */
-#endif
- out32(GPIO0_OSRH, CONFIG_SYS_GPIO0_OSRH); /* output select */
- out32(GPIO0_OSRL, CONFIG_SYS_GPIO0_OSRL);
- out32(GPIO0_ISR1H, CONFIG_SYS_GPIO0_ISR1H); /* input select */
- out32(GPIO0_ISR1L, CONFIG_SYS_GPIO0_ISR1L);
- out32(GPIO0_TSRH, CONFIG_SYS_GPIO0_TSRH); /* three-state select */
- out32(GPIO0_TSRL, CONFIG_SYS_GPIO0_TSRL);
-#if defined(CONFIG_SYS_GPIO0_ISR2H)
- out32(GPIO0_ISR2H, CONFIG_SYS_GPIO0_ISR2H);
- out32(GPIO0_ISR2L, CONFIG_SYS_GPIO0_ISR2L);
-#endif
-#if defined (CONFIG_SYS_GPIO0_TCR)
- out32(GPIO0_TCR, CONFIG_SYS_GPIO0_TCR); /* enable output driver for outputs */
-#endif
-#endif /* CONFIG_405EP ... && !CONFIG_SYS_4xx_GPIO_TABLE */
-
-#if defined (CONFIG_405EP)
- /*
- * Set EMAC noise filter bits
- */
- mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
-
- /*
- * Enable the internal PCI arbiter
- */
- mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
-#endif /* CONFIG_405EP */
-
-#if defined(CONFIG_SYS_4xx_GPIO_TABLE)
- gpio_set_chip_configuration();
-#endif /* CONFIG_SYS_4xx_GPIO_TABLE */
-
- /*
- * External Bus Controller (EBC) Setup
- */
-#if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
-#if (defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
- defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
- defined(CONFIG_405EX) || defined(CONFIG_405))
- /*
- * Move the next instructions into icache, since these modify the flash
- * we are running from!
- */
- asm volatile(" bl 0f" ::: "lr");
- asm volatile("0: mflr 3" ::: "r3");
- asm volatile(" addi 4, 0, 14" ::: "r4");
- asm volatile(" mtctr 4" ::: "ctr");
- asm volatile("1: icbt 0, 3");
- asm volatile(" addi 3, 3, 32" ::: "r3");
- asm volatile(" bdnz 1b" ::: "ctr", "cr0");
- asm volatile(" addis 3, 0, 0x0" ::: "r3");
- asm volatile(" ori 3, 3, 0xA000" ::: "r3");
- asm volatile(" mtctr 3" ::: "ctr");
- asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
-#endif
-
- mtebc(pb0ap, CONFIG_SYS_EBC_PB0AP);
- mtebc(pb0cr, CONFIG_SYS_EBC_PB0CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 1))
- mtebc(pb1ap, CONFIG_SYS_EBC_PB1AP);
- mtebc(pb1cr, CONFIG_SYS_EBC_PB1CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 2))
- mtebc(pb2ap, CONFIG_SYS_EBC_PB2AP);
- mtebc(pb2cr, CONFIG_SYS_EBC_PB2CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 3))
- mtebc(pb3ap, CONFIG_SYS_EBC_PB3AP);
- mtebc(pb3cr, CONFIG_SYS_EBC_PB3CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 4))
- mtebc(pb4ap, CONFIG_SYS_EBC_PB4AP);
- mtebc(pb4cr, CONFIG_SYS_EBC_PB4CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 5))
- mtebc(pb5ap, CONFIG_SYS_EBC_PB5AP);
- mtebc(pb5cr, CONFIG_SYS_EBC_PB5CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 6))
- mtebc(pb6ap, CONFIG_SYS_EBC_PB6AP);
- mtebc(pb6cr, CONFIG_SYS_EBC_PB6CR);
-#endif
-
-#if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR)
&& !(CONFIG_SYS_INIT_DCACHE_CS == 7))
- mtebc(pb7ap, CONFIG_SYS_EBC_PB7AP);
- mtebc(pb7cr, CONFIG_SYS_EBC_PB7CR);
-#endif
-
-#if defined (CONFIG_SYS_EBC_CFG)
- mtebc(EBC0_CFG, CONFIG_SYS_EBC_CFG);
-#endif
-
-#if defined(CONFIG_WATCHDOG)
- val = mfspr(tcr);
-#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
- val |= 0xb8000000; /* generate system reset after 1.34 seconds */
-#elif defined(CONFIG_440EPX)
- val |= 0xb0000000; /* generate system reset after 1.34 seconds */
-#else
- val |= 0xf0000000; /* generate system reset after 2.684 seconds */
-#endif
-#if defined(CONFIG_SYS_4xx_RESET_TYPE)
- val &= ~0x30000000; /* clear WRC bits */
- val |= CONFIG_SYS_4xx_RESET_TYPE << 28; /* set board specific WRC type */
-#endif
- mtspr(tcr, val);
-
- val = mfspr(tsr);
- val |= 0x80000000; /* enable watchdog timer */
- mtspr(tsr, val);
-
- reset_4xx_watchdog();
-#endif /* CONFIG_WATCHDOG */
-
-#if defined(CONFIG_440GX)
- /* Take the GX out of compatibility mode
- * Travis Sawyer, 9 Mar 2004
- * NOTE: 440gx user manual inconsistency here
- * Compatibility mode and Ethernet Clock select are not
- * correct in the manual
- */
- mfsdr(sdr_mfr, val);
- val &= ~0x10000000;
- mtsdr(sdr_mfr,val);
-#endif /* CONFIG_440GX */
-
-#if defined(CONFIG_460EX)
- /*
- * Set SDR0_AHB_CFG[A2P_INCR4] (bit 24) and
- * clear SDR0_AHB_CFG[A2P_PROT2] (bit 25) for a new 460EX errata
- * regarding concurrent use of AHB USB OTG, USB 2.0 host and SATA
- */
- mfsdr(SDR0_AHB_CFG, val);
- val |= 0x80;
- val &= ~0x40;
- mtsdr(SDR0_AHB_CFG, val);
- mfsdr(SDR0_USB2HOST_CFG, val);
- val &= ~0xf00;
- val |= 0x400;
- mtsdr(SDR0_USB2HOST_CFG, val);
-#endif /* CONFIG_460EX */
-
-#if defined(CONFIG_405EX) || \
- defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
- defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
- defined(CONFIG_460SX)
- /*
- * Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
- */
- mtdcr(plb0_acr, (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) |
- plb0_acr_rdp_4deep);
- mtdcr(plb1_acr, (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) |
- plb1_acr_rdp_4deep);
-#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
-}
-
-/*
- * initialize higher level parts of CPU like time base and timers
- */
-int cpu_init_r (void)
-{
-#if defined(CONFIG_405GP)
- uint pvr = get_pvr();
-
- /*
- * Set edge conditioning circuitry on PPC405GPr
- * for compatibility to existing PPC405GP designs.
- */
- if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
- mtdcr(ecr, 0x60606000);
- }
-#endif /* defined(CONFIG_405GP) */
-
- return 0;
-}
+ /*
+ * (C) Copyright 2000-2007
+ * Wolfgang Denk, DENX Software Engineering, w...@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 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 <watchdog.h>
+#include <ppc4xx_enet.h>
+#include <asm/processor.h>
+#include <asm/gpio.h>
+#include <ppc4xx.h>
+
+#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+#ifndef CFG_PLL_RECONFIG
+#define CFG_PLL_RECONFIG 0
+#endif
+
+
+#define BOOT_STRAP_OPTION_A 0x00000000
+#define BOOT_STRAP_OPTION_B 0x00000001
+#define BOOT_STRAP_OPTION_D 0x00000003
+#define BOOT_STRAP_OPTION_E 0x00000004
+
+
+
+
+void reconfigure_pll(u32 new_cpu_freq)
+{
+#if defined(CONFIG_440EPX)
+ int reset_needed = 0;
+ u32 reg, temp;
+ u32 prbdv0, target_prbdv0, /* CLK_PRIMBD */
+ fwdva, target_fwdva, fwdvb, target_fwdvb, /* CLK_PLLD */
+ fbdv, target_fbdv, lfbdv, target_lfbdv,
+ perdv0, target_perdv0, /* CLK_PERD */
+ spcid0, target_spcid0; /* CLK_SPCID */
+
+
+ /* Reconfigure clocks if necessary.
+ * See PPC440EPx User's Manual, sections 8.2 and 14 */
+ if (new_cpu_freq == 667) {
+ target_prbdv0 = 2;
+ target_fwdva = 2;
+ target_fwdvb = 4;
+ target_fbdv = 20;
+ target_lfbdv = 1;
+ target_perdv0 = 4;
+ target_spcid0 = 4;
+
+ mfcpr(clk_primbd, reg);
+ temp = (reg & PRBDV_MASK) >> 24;
+ prbdv0 = temp ? temp : 8;
+ if (prbdv0 != target_prbdv0) {
+ reg &= ~PRBDV_MASK;
+ reg |= ((target_prbdv0 == 8 ? 0 : target_prbdv0) << 24);
+ mtcpr(clk_primbd, reg);
+ reset_needed = 1;
+ }
+
+ mfcpr(clk_plld, reg);
+
+ temp = (reg & PLLD_FWDVA_MASK) >> 16;
+ fwdva = temp ? temp : 16;
+
+ temp = (reg & PLLD_FWDVB_MASK) >> 8;
+ fwdvb = temp ? temp : 8;
+
+ temp = (reg & PLLD_FBDV_MASK) >> 24;
+ fbdv = temp ? temp : 32;
+
+ temp = (reg & PLLD_LFBDV_MASK);
+ lfbdv = temp ? temp : 64;
+
+ if (fwdva != target_fwdva || fbdv != target_fbdv || lfbdv != target_lfbdv) {
+ reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
+ PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
+ reg |= ((target_fwdva == 16 ? 0 : target_fwdva) << 16) |
+ ((target_fwdvb == 8 ? 0 : target_fwdvb) << 8) |
+ ((target_fbdv == 32 ? 0 : target_fbdv) << 24) |
+ (target_lfbdv == 64 ? 0 : target_lfbdv);
+ mtcpr(clk_plld, reg);
+ reset_needed = 1;
+ }
+
+ mfcpr(clk_perd, reg);
+ perdv0 = (reg & CPR0_PERD_PERDV0_MASK) >> 24;
+ if (perdv0 != target_perdv0) {
+ reg &= ~CPR0_PERD_PERDV0_MASK;
+ reg |= (target_perdv0 << 24);
+ mtcpr(clk_perd, reg);
+ reset_needed = 1;
+ }
+
+ mfcpr(clk_spcid, reg);
+ temp = (reg & CPR0_SPCID_SPCIDV0_MASK) >> 24;
+ spcid0 = temp ? temp : 4;
+ if (spcid0 != target_spcid0) {
+ reg &= ~CPR0_SPCID_SPCIDV0_MASK;
+ reg |= ((target_spcid0 == 4 ? 0 : target_spcid0) << 24);
+ mtcpr(clk_spcid, reg);
+ reset_needed = 1;
+ }
+ }
+
+/*
+440EPx fixed bootstrap options A, B, D, and E currently set PLL FWDVA to a
+divisor value = 1. This results in the PLLOUTB being greater than the CPU
+clock frequency which causes unstable 440EPx operation resulting in various
+software hang conditions. The user manual and the data sheet both specify that
+a FWDVB = 1 is not a valid setting.
+
+If the customer uses the IIC attached EEPROM to set bootstrap options, this is
+not a problem. Some customers choose to use one of the fixed bootstrap options
+(A, B, D, or E)and do not have an EEPROM to use for programmable bootstrap
+options. This requires that FWDVA and PRBDV0 be re-programmed early in the chip
+initialization process by software. The procedure for re-programming the PLL
+is defined in the 440EPx user manual section 8.3, Bootstrap Options.
+*/
+
+
+
+
+
+
+
+
+ /* Get current value of FWDVA.*/
+
+ mfcpr(clk_plld, reg);
+ temp = (reg & PLLD_FWDVA_MASK) >> 16;
+ /* Check to see if FWDVA has */
+ /* been set to a value of 1. if*/
+ /* it has we must modify it. */
+
+ if (temp == 1) {
+
+ mfcpr(clk_plld, reg);
+
+ /* Get current value of fbdv. */
+ temp = (reg & PLLD_FBDV_MASK) >> 24;
+ fbdv = temp ? temp : 32;
+ /* Get current value of lfbdv. */
+ temp = (reg & PLLD_LFBDV_MASK);
+ lfbdv = temp ? temp : 64;
+
+ /* Load register that contains */
+ /* current boot strapping */
+ /* option. */
+ mfcpr(clk_icfg, reg);
+ /* Shift strapping option into */
+ /* low 3 bits. */
+ reg = (reg >> 28);
+
+ switch(reg) {
+ case BOOT_STRAP_OPTION_A:
+ case BOOT_STRAP_OPTION_B:
+ case BOOT_STRAP_OPTION_D:
+ case BOOT_STRAP_OPTION_E:
+ /* Get current value of FWDVA.*/
+ /* Assign current FWDVA to */
+ /* new FWDVB. */
+ mfcpr(clk_plld, reg);
+ target_fwdvb = (reg & PLLD_FWDVA_MASK) >> 16;
+ fwdvb = target_fwdvb ? target_fwdvb : 8;
+ /* Get current value of FWDVB.*/
+ /* Assign current FWDVB to */
+ /* new FWDVA. */
+ target_fwdva = (reg & PLLD_FWDVB_MASK) >> 8;
+ fwdva = target_fwdva ? target_fwdva : 16;
+ /* Update clk_plld with */
+ /* switched FWDVA and FWDVB. */
+ reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK | PLLD_FBDV_MASK |
PLLD_LFBDV_MASK);
+ reg |= ((fwdva == 16 ? 0 : fwdva) << 16) |
+ ((fwdvb == 8 ? 0 : fwdvb) << 8) |
+ ((fbdv == 32 ? 0 : fbdv) << 24) |
+ (lfbdv == 64 ? 0 : lfbdv);
+ mtcpr(clk_plld, reg);
+ /* Acknowledge that a reset */
+ /* is required. */
+
+ reset_needed = 1;
+ break;
+
+ default:
+ /* All other case are OK. */
+ /* Nothing to do. */
+ break;
+ }
+
+ }
+
+ if (reset_needed) {
+ /* Set reload inhibit so */
+ /* configuration will persist */
+ /* across processor reset. */
+ mfcpr(clk_icfg, reg);
+ reg &= ~CPR0_ICFG_RLI_MASK;
+ reg |= 1 << 31;
+ mtcpr(clk_icfg, reg);
+ /* Reset processor if */
+ /* configuration changed. */
+ __asm__ __volatile__ ("sync; isync");
+ mtspr(dbcr0, 0x20000000);
+ }
+#endif
+}
+
+/*
+ * Breath some life into the CPU...
+ *
+ * Reconfigure PLL if necessary,
+ * set up the memory map,
+ * initialize a bunch of registers
+ */
+void
+cpu_init_f (void)
+{
+#if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
+ u32 val;
+#endif
+
+ reconfigure_pll(CFG_PLL_RECONFIG);
+
+#ifndef CONFIG_KAVORKA
+#if (defined(CONFIG_405EP) || defined (CONFIG_405EX)) &&
!defined(CFG_4xx_GPIO_TABLE)
+ /*
+ * GPIO0 setup (select GPIO or alternate function)
+ */
+#if defined(CFG_GPIO0_OR)
+ out32(GPIO0_OR, CFG_GPIO0_OR); /* set initial state of output pins */
+#endif
+#if defined(CFG_GPIO0_ODR)
+ out32(GPIO0_ODR, CFG_GPIO0_ODR); /* open-drain select */
+#endif
+ out32(GPIO0_OSRH, CFG_GPIO0_OSRH); /* output select */
+ out32(GPIO0_OSRL, CFG_GPIO0_OSRL);
+ out32(GPIO0_ISR1H, CFG_GPIO0_ISR1H); /* input select */
+ out32(GPIO0_ISR1L, CFG_GPIO0_ISR1L);
+ out32(GPIO0_TSRH, CFG_GPIO0_TSRH); /* three-state select */
+ out32(GPIO0_TSRL, CFG_GPIO0_TSRL);
+#if defined(CFG_GPIO0_ISR2H)
+ out32(GPIO0_ISR2H, CFG_GPIO0_ISR2H);
+ out32(GPIO0_ISR2L, CFG_GPIO0_ISR2L);
+#endif
+#if defined (CFG_GPIO0_TCR)
+ out32(GPIO0_TCR, CFG_GPIO0_TCR); /* enable output driver for outputs */
+#endif
+#endif /* CONFIG_405EP ... && !CFG_4xx_GPIO_TABLE */
+#endif /* ifndef CONFIG_KAVORKA */
+
+#if defined (CONFIG_405EP)
+ /*
+ * Set EMAC noise filter bits
+ */
+ mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
+
+ /*
+ * Enable the internal PCI arbiter
+ */
+ mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
+#endif /* CONFIG_405EP */
+
+#if defined(CFG_4xx_GPIO_TABLE)
+ gpio_set_chip_configuration();
+#endif /* CFG_4xx_GPIO_TABLE */
+
+ /*
+ * External Bus Controller (EBC) Setup
+ */
+#if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
+#if (defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
+ defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
+ defined(CONFIG_405EX) || defined(CONFIG_405))
+ /*
+ * Move the next instructions into icache, since these modify the flash
+ * we are running from!
+ */
+ asm volatile(" bl 0f" ::: "lr");
+ asm volatile("0: mflr 3" ::: "r3");
+ asm volatile(" addi 4, 0, 14" ::: "r4");
+ asm volatile(" mtctr 4" ::: "ctr");
+ asm volatile("1: icbt 0, 3");
+ asm volatile(" addi 3, 3, 32" ::: "r3");
+ asm volatile(" bdnz 1b" ::: "ctr", "cr0");
+ asm volatile(" addis 3, 0, 0x0" ::: "r3");
+ asm volatile(" ori 3, 3, 0xA000" ::: "r3");
+ asm volatile(" mtctr 3" ::: "ctr");
+ asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
+#endif
+
+ mtebc(pb0ap, CFG_EBC_PB0AP);
+ mtebc(pb0cr, CFG_EBC_PB0CR);
+#endif
+
+#if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR) &&
!(CFG_INIT_DCACHE_CS == 1))
+ mtebc(pb1ap, CFG_EBC_PB1AP);
+ mtebc(pb1cr, CFG_EBC_PB1CR);
+#endif
+
+#if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR) &&
!(CFG_INIT_DCACHE_CS == 2))
+ mtebc(pb2ap, CFG_EBC_PB2AP);
+ mtebc(pb2cr, CFG_EBC_PB2CR);
+#endif
+
+#if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR) &&
!(CFG_INIT_DCACHE_CS == 3))
+ mtebc(pb3ap, CFG_EBC_PB3AP);
+ mtebc(pb3cr, CFG_EBC_PB3CR);
+#endif
+
+#if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR) &&
!(CFG_INIT_DCACHE_CS == 4))
+ mtebc(pb4ap, CFG_EBC_PB4AP);
+ mtebc(pb4cr, CFG_EBC_PB4CR);
+#endif
+
+#if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR) &&
!(CFG_INIT_DCACHE_CS == 5))
+ mtebc(pb5ap, CFG_EBC_PB5AP);
+ mtebc(pb5cr, CFG_EBC_PB5CR);
+#endif
+
+#if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR) &&
!(CFG_INIT_DCACHE_CS == 6))
+ mtebc(pb6ap, CFG_EBC_PB6AP);
+ mtebc(pb6cr, CFG_EBC_PB6CR);
+#endif
+
+#if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR) &&
!(CFG_INIT_DCACHE_CS == 7))
+ mtebc(pb7ap, CFG_EBC_PB7AP);
+ mtebc(pb7cr, CFG_EBC_PB7CR);
+#endif
+
+#if defined (CFG_EBC_CFG)
+ mtebc(EBC0_CFG, CFG_EBC_CFG);
+#endif
+
+#if defined(CONFIG_WATCHDOG)
+ val = mfspr(tcr);
+#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
+ val |= 0xb8000000; /* generate system reset after 1.34 seconds */
+#elif defined(CONFIG_440EPX)
+ val |= 0xb0000000; /* generate system reset after 1.34 seconds */
+#else
+ val |= 0xf0000000; /* generate system reset after 2.684 seconds */
+#endif
+#if defined(CFG_4xx_RESET_TYPE)
+ val &= ~0x30000000; /* clear WRC bits */
+ val |= CFG_4xx_RESET_TYPE << 28; /* set board specific WRC type */
+#endif
+ mtspr(tcr, val);
+
+ val = mfspr(tsr);
+ val |= 0x80000000; /* enable watchdog timer */
+ mtspr(tsr, val);
+
+ reset_4xx_watchdog();
+#endif /* CONFIG_WATCHDOG */
+
+#if defined(CONFIG_440GX)
+ /* Take the GX out of compatibility mode
+ * Travis Sawyer, 9 Mar 2004
+ * NOTE: 440gx user manual inconsistency here
+ * Compatibility mode and Ethernet Clock select are not
+ * correct in the manual
+ */
+ mfsdr(sdr_mfr, val);
+ val &= ~0x10000000;
+ mtsdr(sdr_mfr,val);
+#endif /* CONFIG_440GX */
+
+#if defined(CONFIG_460EX)
+ /*
+ * Set SDR0_AHB_CFG[A2P_INCR4] (bit 24) and
+ * clear SDR0_AHB_CFG[A2P_PROT2] (bit 25) for a new 460EX errata
+ * regarding concurrent use of AHB USB OTG, USB 2.0 host and SATA
+ */
+ mfsdr(SDR0_AHB_CFG, val);
+ val |= 0x80;
+ val &= ~0x40;
+ mtsdr(SDR0_AHB_CFG, val);
+ mfsdr(SDR0_USB2HOST_CFG, val);
+ val &= ~0xf00;
+ val |= 0x400;
+ mtsdr(SDR0_USB2HOST_CFG, val);
+#endif /* CONFIG_460EX */
+
+#if defined(CONFIG_405EX) || \
+ defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+ defined(CONFIG_460SX)
+ /*
+ * Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
+ */
+ mtdcr(plb0_acr, (mfdcr(plb0_acr) & ~plb0_acr_rdp_mask) |
+ plb0_acr_rdp_4deep);
+ mtdcr(plb1_acr, (mfdcr(plb1_acr) & ~plb1_acr_rdp_mask) |
+ plb1_acr_rdp_4deep);
+#endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
+}
+
+/*
+ * initialize higher level parts of CPU like time base and timers
+ */
+int cpu_init_r (void)
+{
+#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
+ bd_t *bd = gd->bd;
+ unsigned long reg;
+#if defined(CONFIG_405GP)
+ uint pvr = get_pvr();
+#endif
+
+ /*
+ * Write Ethernetaddress into on-chip register
+ */
+ reg = 0x00000000;
+ reg |= bd->bi_enetaddr[0]; /* set high address */
+ reg = reg << 8;
+ reg |= bd->bi_enetaddr[1];
+ out32 (EMAC_IAH, reg);
+
+ reg = 0x00000000;
+ reg |= bd->bi_enetaddr[2]; /* set low address */
+ reg = reg << 8;
+ reg |= bd->bi_enetaddr[3];
+ reg = reg << 8;
+ reg |= bd->bi_enetaddr[4];
+ reg = reg << 8;
+ reg |= bd->bi_enetaddr[5];
+ out32 (EMAC_IAL, reg);
+
+#if defined(CONFIG_405GP)
+ /*
+ * Set edge conditioning circuitry on PPC405GPr
+ * for compatibility to existing PPC405GP designs.
+ */
+ if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
+ mtdcr(ecr, 0x60606000);
+ }
+#endif /* defined(CONFIG_405GP) */
+#endif /* defined(CONFIG_405GP) || defined(CONFIG_405EP) */
+
+ return (0);
+}
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