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-rw-r--r--cpu/blackfin/initcode.c189
-rw-r--r--cpu/blackfin/start.S83
2 files changed, 190 insertions, 82 deletions
diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index bbc2fa5..7bd4b22 100644
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -12,6 +12,7 @@
#include <config.h>
#include <asm/blackfin.h>
#include <asm/mach-common/bits/bootrom.h>
+#include <asm/mach-common/bits/core.h>
#include <asm/mach-common/bits/ebiu.h>
#include <asm/mach-common/bits/pll.h>
#include <asm/mach-common/bits/uart.h>
@@ -257,6 +258,8 @@ void initcode(ADI_BOOT_DATA *bootstruct)
divB = serial_early_get_div();
}
+ serial_putc('A');
+
#ifdef CONFIG_HW_WATCHDOG
# ifndef CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE
# define CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE 20000
@@ -273,7 +276,23 @@ void initcode(ADI_BOOT_DATA *bootstruct)
}
#endif
- serial_putc('S');
+ serial_putc('B');
+
+ /* If external memory is enabled, put it into self refresh first. */
+ bool put_into_srfs = false;
+#ifdef EBIU_RSTCTL
+ if (bfin_read_EBIU_RSTCTL() & DDR_SRESET) {
+ bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | SRREQ);
+ put_into_srfs = true;
+ }
+#else
+ if (bfin_read_EBIU_SDBCTL() & EBE) {
+ bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() | SRFS);
+ put_into_srfs = true;
+ }
+#endif
+
+ serial_putc('C');
/* Blackfin bootroms use the SPI slow read opcode instead of the SPI
* fast read, so we need to slow down the SPI clock a lot more during
@@ -286,29 +305,26 @@ void initcode(ADI_BOOT_DATA *bootstruct)
bfin_write_SPI_BAUD(CONFIG_SPI_BAUD_INITBLOCK);
}
- serial_putc('B');
+ serial_putc('D');
- /* Disable all peripheral wakeups except for the PLL event. */
-#ifdef SIC_IWR0
- bfin_write_SIC_IWR0(1);
- bfin_write_SIC_IWR1(0);
-# ifdef SIC_IWR2
- bfin_write_SIC_IWR2(0);
-# endif
-#elif defined(SICA_IWR0)
- bfin_write_SICA_IWR0(1);
- bfin_write_SICA_IWR1(0);
+ /* If we're entering self refresh, make sure it has happened. */
+ if (put_into_srfs)
+#ifdef EBIU_RSTCTL
+ while (!(bfin_read_EBIU_RSTCTL() & SRACK))
#else
- bfin_write_SIC_IWR(1);
+ while (!(bfin_read_EBIU_SDSTAT() & SDSRA))
#endif
+ continue;
+
+ serial_putc('E');
/* With newer bootroms, we use the helper function to set up
* the memory controller. Older bootroms lacks such helpers
* so we do it ourselves.
*/
-#define BOOTROM_CAPS_SYSCONTROL 0
- if (BOOTROM_CAPS_SYSCONTROL) {
- serial_putc('S');
+ uint16_t vr_ctl = bfin_read_VR_CTL();
+ if (!ANOMALY_05000386) {
+ serial_putc('F');
ADI_SYSCTRL_VALUES memory_settings;
uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT;
@@ -332,22 +348,38 @@ void initcode(ADI_BOOT_DATA *bootstruct)
bfin_write_SIC_IWR1(-1);
#endif
} else {
- serial_putc('L');
+ serial_putc('G');
+
+ /* Disable all peripheral wakeups except for the PLL event. */
+#ifdef SIC_IWR0
+ bfin_write_SIC_IWR0(1);
+ bfin_write_SIC_IWR1(0);
+# ifdef SIC_IWR2
+ bfin_write_SIC_IWR2(0);
+# endif
+#elif defined(SICA_IWR0)
+ bfin_write_SICA_IWR0(1);
+ bfin_write_SICA_IWR1(0);
+#else
+ bfin_write_SIC_IWR(1);
+#endif
+
+ serial_putc('H');
bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
- serial_putc('A');
+ serial_putc('I');
/* Only reprogram when needed to avoid triggering unnecessary
* PLL relock sequences.
*/
- if (bfin_read_VR_CTL() != CONFIG_VR_CTL_VAL) {
+ if (vr_ctl != CONFIG_VR_CTL_VAL) {
serial_putc('!');
bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
asm("idle;");
}
- serial_putc('C');
+ serial_putc('J');
bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
@@ -361,8 +393,26 @@ void initcode(ADI_BOOT_DATA *bootstruct)
bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
asm("idle;");
}
+
+ serial_putc('L');
+
+ /* Restore all peripheral wakeups. */
+#ifdef SIC_IWR0
+ bfin_write_SIC_IWR0(-1);
+ bfin_write_SIC_IWR1(-1);
+# ifdef SIC_IWR2
+ bfin_write_SIC_IWR2(-1);
+# endif
+#elif defined(SICA_IWR0)
+ bfin_write_SICA_IWR0(-1);
+ bfin_write_SICA_IWR1(-1);
+#else
+ bfin_write_SIC_IWR(-1);
+#endif
}
+ serial_putc('M');
+
/* Since we've changed the SCLK above, we may need to update
* the UART divisors (UART baud rates are based on SCLK).
* Do the division by hand as there are no native instructions
@@ -380,23 +430,32 @@ void initcode(ADI_BOOT_DATA *bootstruct)
serial_early_put_div(quotient - ANOMALY_05000230);
}
- serial_putc('F');
+ serial_putc('N');
- /* Program the async banks controller. */
- bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
- bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
- bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
+ /* Program the external memory controller before we come out of
+ * self-refresh. This only works with our SDRAM controller.
+ */
+#ifndef EBIU_RSTCTL
+ bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
+ bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
+ bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
+#endif
-#ifdef EBIU_MODE
- /* Not all parts have these additional MMRs. */
- bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
- bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
- bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
+ serial_putc('O');
+
+ /* Now that we've reprogrammed, take things out of self refresh. */
+ if (put_into_srfs)
+#ifdef EBIU_RSTCTL
+ bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() & ~(SRREQ));
+#else
+ bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() & ~(SRFS));
#endif
- serial_putc('I');
+ serial_putc('P');
- /* Program the external memory controller. */
+ /* Our DDR controller sucks and cannot be programmed while in
+ * self-refresh. So we have to pull it out before programming.
+ */
#ifdef EBIU_RSTCTL
bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | 0x1 /*DDRSRESET*/ | CONFIG_EBIU_RSTCTL_VAL);
bfin_write_EBIU_DDRCTL0(CONFIG_EBIU_DDRCTL0_VAL);
@@ -406,28 +465,60 @@ void initcode(ADI_BOOT_DATA *bootstruct)
/* default is disable, so don't need to force this */
bfin_write_EBIU_DDRCTL3(CONFIG_EBIU_DDRCTL3_VAL);
# endif
-#else
- bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
- bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
- bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
+# ifdef CONFIG_EBIU_DDRQUE_VAL
+ bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | CONFIG_EBIU_DDRQUE_VAL);
+# endif
#endif
- serial_putc('N');
+ serial_putc('Q');
- /* Restore all peripheral wakeups. */
-#ifdef SIC_IWR0
- bfin_write_SIC_IWR0(-1);
- bfin_write_SIC_IWR1(-1);
-# ifdef SIC_IWR2
- bfin_write_SIC_IWR2(-1);
-# endif
-#elif defined(SICA_IWR0)
- bfin_write_SICA_IWR0(-1);
- bfin_write_SICA_IWR1(-1);
-#else
- bfin_write_SIC_IWR(-1);
+ /* Are we coming out of hibernate (suspend to memory) ?
+ * The memory layout is:
+ * 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
+ * 0x4: return address
+ * 0x8: stack pointer
+ *
+ * SCKELOW is unreliable on older parts (anomaly 307)
+ */
+ if (ANOMALY_05000307 || vr_ctl & 0x8000) {
+ uint32_t *hibernate_magic = 0;
+ __builtin_bfin_ssync(); /* make sure memory controller is done */
+ if (hibernate_magic[0] == 0xDEADBEEF) {
+ serial_putc('R');
+ bfin_write_EVT15(hibernate_magic[1]);
+ bfin_write_IMASK(EVT_IVG15);
+ __asm__ __volatile__ (
+ /* load reti early to avoid anomaly 281 */
+ "reti = %0;"
+ /* clear hibernate magic */
+ "[%0] = %1;"
+ /* load stack pointer */
+ "SP = [%0 + 8];"
+ /* lower ourselves from reset ivg to ivg15 */
+ "raise 15;"
+ "rti;"
+ :
+ : "p"(hibernate_magic), "d"(0x2000 /* jump.s 0 */)
+ );
+ }
+ }
+
+ serial_putc('S');
+
+ /* Program the async banks controller. */
+ bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
+ bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
+ bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
+
+#ifdef EBIU_MODE
+ /* Not all parts have these additional MMRs. */
+ bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
+ bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
+ bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
#endif
+ serial_putc('T');
+
/* tell the bootrom where our entry point is */
if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS)
bfin_write_EVT1(CONFIG_SYS_MONITOR_BASE);
diff --git a/cpu/blackfin/start.S b/cpu/blackfin/start.S
index 6c8def4..506fea5 100644
--- a/cpu/blackfin/start.S
+++ b/cpu/blackfin/start.S
@@ -95,36 +95,64 @@ ENTRY(_start)
/* Save RETX so we can pass it while booting Linux */
r7 = RETX;
-#if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS)
- /* In bypass mode, we don't have an LDR with an init block
- * so we need to explicitly call it ourselves. This will
- * reprogram our clocks and setup our async banks.
- */
- /* XXX: we should DMA this into L1, put external memory into
- * self refresh, and then jump there ...
+ /* Figure out where we are currently executing so that we can decide
+ * how to best reprogram and relocate things. We'll pass below:
+ * R4: load address of _start
+ * R5: current (not load) address of _start
*/
+ serial_early_puts("Find ourselves");
+
call _get_pc;
- r3 = 0x0;
- r3.h = 0x2000;
- cc = r0 < r3 (iu);
- if cc jump .Lproc_initialized;
+.Loffset:
+ r1.l = .Loffset;
+ r1.h = .Loffset;
+ r4.l = _start;
+ r4.h = _start;
+ r3 = r1 - r4;
+ r5 = r0 - r3;
+
+ /* Inform upper layers if we had to do the relocation ourselves.
+ * This allows us to detect whether we were loaded by 'go 0x1000'
+ * or by the bootrom from an LDR. "R6" is "loaded_from_ldr".
+ */
+ r6 = 1 (x);
+ cc = r4 == r5;
+ if cc jump .Lnorelocate;
+ r6 = 0 (x);
+ /* In bypass mode, we don't have an LDR with an init block
+ * so we need to explicitly call it ourselves. This will
+ * reprogram our clocks, memory, and setup our async banks.
+ */
serial_early_puts("Program Clocks");
+ /* if we're executing >=0x20000000, then we dont need to dma */
+ r3 = 0x0;
+ r3.h = 0x2000;
+ cc = r5 < r3 (iu);
+ if cc jump .Ldma_and_reprogram;
call _initcode;
+ jump .Lprogrammed;
+
+ /* we're sitting in external memory, so dma into L1 and reprogram */
+.Ldma_and_reprogram:
+ r0.l = LO(L1_INST_SRAM);
+ r0.h = HI(L1_INST_SRAM);
+ r1.l = __initcode_start;
+ r1.h = __initcode_start;
+ r2.l = __initcode_end;
+ r2.h = __initcode_end;
+ r2 = r2 - r1; /* convert r2 into length of initcode */
+ r1 = r1 - r4; /* convert r1 from load address of initcode ... */
+ r1 = r1 + r5; /* ... to current (not load) address of initcode */
+ p3 = r0;
+ call _dma_memcpy_nocache;
+ call (p3);
/* Since we reprogrammed SCLK, we need to update the serial divisor */
+.Lprogrammed:
serial_early_set_baud
-.Lproc_initialized:
-#endif
-
- /* Inform upper layers if we had to do the relocation ourselves.
- * This allows us to detect whether we were loaded by 'go 0x1000'
- * or by the bootrom from an LDR. "r6" is "loaded_from_ldr".
- */
- r6 = 1 (x);
-
/* Relocate from wherever we are (FLASH/RAM/etc...) to the hardcoded
* monitor location in the end of RAM. We know that memcpy() only
* uses registers, so it is safe to call here. Note that this only
@@ -132,19 +160,8 @@ ENTRY(_start)
* it yet (see "lower to 15" below).
*/
serial_early_puts("Relocate");
- call _get_pc;
-.Loffset:
- r2.l = .Loffset;
- r2.h = .Loffset;
- r3.l = _start;
- r3.h = _start;
- r2 = r2 - r3;
- r1 = r0 - r2;
- cc = r1 == r3;
- if cc jump .Lnorelocate;
- r6 = 0 (x);
-
- r0 = r3;
+ r0 = r4;
+ r1 = r5;
r2.l = LO(CONFIG_SYS_MONITOR_LEN);
r2.h = HI(CONFIG_SYS_MONITOR_LEN);
call _memcpy_ASM;
generated by cgit v1.1 at 2024-12-04 22:44:23 +0000