sparc: leon3: Added memory controller initialization using new AMBA PnP routines.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
diff --git a/arch/sparc/cpu/leon3/Makefile b/arch/sparc/cpu/leon3/Makefile
index c5068a8..f4cf43c 100644
--- a/arch/sparc/cpu/leon3/Makefile
+++ b/arch/sparc/cpu/leon3/Makefile
@@ -7,4 +7,4 @@
extra-y = start.o
obj-y = cpu_init.o serial.o cpu.o ambapp.o ambapp_low.o ambapp_low_c.o \
- interrupts.o prom.o usb_uhci.o
+ interrupts.o prom.o usb_uhci.o memcfg.o memcfg_low.o
diff --git a/arch/sparc/cpu/leon3/memcfg.c b/arch/sparc/cpu/leon3/memcfg.c
new file mode 100644
index 0000000..b9eda44
--- /dev/null
+++ b/arch/sparc/cpu/leon3/memcfg.c
@@ -0,0 +1,237 @@
+/* GRLIB Memory controller setup. The register values are used
+ * from the associated low level assembler routine implemented
+ * in memcfg_low.S.
+ *
+ * (C) Copyright 2010, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <ambapp.h>
+#include "memcfg.h"
+#include <config.h>
+
+#ifdef CONFIG_SYS_GRLIB_ESA_MCTRL1
+struct mctrl_setup esa_mctrl1_cfg = {
+ .reg_mask = 0x7,
+ .regs = {
+ {
+ .mask = 0x00000300,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL1_CFG1,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL1_CFG2,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL1_CFG3,
+ },
+ }
+};
+#ifdef CONFIG_SYS_GRLIB_ESA_MCTRL2
+struct mctrl_setup esa_mctrl2_cfg = {
+ .reg_mask = 0x7,
+ .regs = {
+ {
+ .mask = 0x00000300,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL2_CFG1,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL2_CFG2,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_ESA_MCTRL2_CFG3,
+ },
+ }
+};
+#endif
+#endif
+
+#ifdef CONFIG_SYS_GRLIB_GAISLER_FTMCTRL1
+struct mctrl_setup gaisler_ftmctrl1_cfg = {
+ .reg_mask = 0x7,
+ .regs = {
+ {
+ .mask = 0x00000300,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL1_CFG1,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL1_CFG2,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL1_CFG3,
+ },
+ }
+};
+#ifdef CONFIG_SYS_GRLIB_GAISLER_FTMCTRL2
+struct mctrl_setup gaisler_ftmctrl2_cfg = {
+ .reg_mask = 0x7,
+ .regs = {
+ {
+ .mask = 0x00000300,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL2_CFG1,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL2_CFG2,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_FTMCTRL2_CFG3,
+ },
+ }
+};
+#endif
+#endif
+
+#ifdef CONFIG_SYS_GRLIB_GAISLER_SDCTRL1
+struct mctrl_setup gaisler_sdctrl1_cfg = {
+ .reg_mask = 0x1,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_SDCTRL1_CTRL,
+ },
+ }
+};
+#ifdef CONFIG_SYS_GRLIB_GAISLER_SDCTRL2
+struct mctrl_setup gaisler_sdctrl2_cfg = {
+ .reg_mask = 0x1,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_SDCTRL2_CTRL,
+ },
+ }
+};
+#endif
+#endif
+
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDR2SPA1
+struct ahbmctrl_setup gaisler_ddr2spa1_cfg = {
+ .ahb_mbar_no = 1,
+ .reg_mask = 0xd,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA1_CFG1,
+ },
+ { 0x00000000, 0},
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA1_CFG3,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA1_CFG4,
+ },
+ }
+};
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDR2SPA2
+struct ahbmctrl_setup gaisler_ddr2spa2_cfg = {
+ .ahb_mbar_no = 1,
+ .reg_mask = 0xd,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA2_CFG1,
+ },
+ { 0x00000000, 0},
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA2_CFG3,
+ },
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDR2SPA2_CFG4,
+ },
+ }
+};
+#endif
+#endif
+
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDRSPA1
+struct ahbmctrl_setup gaisler_ddrspa1_cfg = {
+ .ahb_mbar_no = 1,
+ .reg_mask = 0x1,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDRSPA1_CTRL,
+ },
+ }
+};
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDRSPA2
+struct ahbmctrl_setup gaisler_ddrspa2_cfg = {
+ .ahb_mbar_no = 1,
+ .reg_mask = 0x1,
+ .regs = {
+ {
+ .mask = 0x00000000,
+ .value = CONFIG_SYS_GRLIB_GAISLER_DDRSPA2_CTRL,
+ },
+ }
+};
+#endif
+#endif
+
+struct grlib_mctrl_handler grlib_mctrl_handlers[] = {
+/* ESA MCTRL (PROM/FLASH/IO/SRAM/SDRAM) */
+#ifdef CONFIG_SYS_GRLIB_ESA_MCTRL1
+ {DEV_APB_SLV, 0, MH_UNUSED, AMBA_PNP_ID(VENDOR_ESA, ESA_MCTRL),
+ _nomem_mctrl_init, (void *)&esa_mctrl1_cfg},
+#ifdef CONFIG_SYS_GRLIB_ESA_MCTRL2
+ {DEV_APB_SLV, 1, MH_UNUSED, AMBA_PNP_ID(VENDOR_ESA, ESA_MCTRL),
+ _nomem_mctrl_init, (void *)&esa_mctrl2_cfg},
+#endif
+#endif
+
+/* GAISLER Fault Tolerant Memory controller (PROM/FLASH/IO/SRAM/SDRAM) */
+#ifdef CONFIG_SYS_GRLIB_GAISLER_FTMCTRL1
+ {DEV_APB_SLV, 0, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_FTMCTRL),
+ _nomem_mctrl_init, (void *)&gaisler_ftmctrl1_cfg},
+#ifdef CONFIG_SYS_GRLIB_GAISLER_FTMCTRL2
+ {DEV_APB_SLV, 1, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_FTMCTRL),
+ _nomem_mctrl_init, (void *)&gaisler_ftmctrl2_cfg},
+#endif
+#endif
+
+/* GAISLER SDRAM-only Memory controller (SDRAM) */
+#ifdef CONFIG_SYS_GRLIB_GAISLER_SDCTRL1
+ {DEV_APB_SLV, 0, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_SDCTRL),
+ _nomem_mctrl_init, (void *)&gaisler_sdctrl1_cfg},
+#ifdef CONFIG_SYS_GRLIB_GAISLER_SDCTRL2
+ {DEV_APB_SLV, 1, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_SDCTRL),
+ _nomem_mctrl_init, (void *)&gaisler_sdctrl2_cfg},
+#endif
+#endif
+
+/* GAISLER DDR Memory controller (DDR) */
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDRSPA1
+ {DEV_AHB_SLV, 0, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_DDRSP),
+ _nomem_ahbmctrl_init, (void *)&gaisler_ddrspa1_cfg},
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDRSPA2
+ {DEV_AHB_SLV, 1, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_DDRSP),
+ _nomem_ahbmctrl_init, (void *)&gaisler_ddrspa2_cfg},
+#endif
+#endif
+
+/* GAISLER DDR2 Memory controller (DDR2) */
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDR2SPA1
+ {DEV_AHB_SLV, 0, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_DDR2SP),
+ _nomem_ahbmctrl_init, (void *)&gaisler_ddr2spa1_cfg},
+#ifdef CONFIG_SYS_GRLIB_GAISLER_DDR2SPA2
+ {DEV_AHB_SLV, 1, MH_UNUSED, AMBA_PNP_ID(VENDOR_GAISLER, GAISLER_DDR2SP),
+ _nomem_ahbmctrl_init, (void *)&gaisler_ddr2spa2_cfg},
+#endif
+#endif
+
+ /* Mark end */
+ MH_END
+};
diff --git a/arch/sparc/cpu/leon3/memcfg.h b/arch/sparc/cpu/leon3/memcfg.h
new file mode 100644
index 0000000..a524896
--- /dev/null
+++ b/arch/sparc/cpu/leon3/memcfg.h
@@ -0,0 +1,90 @@
+/* GRLIB Memory controller setup structures
+ *
+ * (C) Copyright 2010, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __MEMCFG_H__
+#define __MEMCFG_H__
+
+/*********** Low Level Memory Controller Initalization ***********/
+
+#ifndef __ASSEMBLER__
+
+struct grlib_mctrl_handler;
+
+typedef void (*mctrl_handler_t)(
+ struct grlib_mctrl_handler *dev,
+ void *conf,
+ unsigned int ioarea
+ );
+
+/* Memory Controller Handler Structure */
+struct grlib_mctrl_handler {
+ unsigned char type; /* 0x00. MASK: AHB MST&SLV, APB SLV */
+ char index; /* 0x01. Unit number, 0, 1, 2... */
+ char unused[2]; /* 0x02 */
+ unsigned int ven_dev; /* 0x04. Device and Vendor */
+ mctrl_handler_t func; /* 0x08. Memory Controller Handler */
+ void *priv; /* 0x0c. Optional private data, ptr to
+ * info how to set up controller */
+};
+
+extern struct grlib_mctrl_handler grlib_mctrl_handlers[];
+
+#endif
+
+#define MH_STRUCT_SIZE (4*4)
+#define MH_TYPE 0x00
+#define MH_INDEX 0x01
+#define MH_VENDOR_DEVICE 0x04
+#define MH_FUNC 0x08
+#define MH_PRIV 0x0c
+
+#define MH_TYPE_NONE DEV_NONE
+#define MH_TYPE_AHB_MST DEV_AHB_MST
+#define MH_TYPE_AHB_SLV DEV_AHB_SLV
+#define MH_TYPE_APB_SLV DEV_APB_SLV
+
+#define MH_UNUSED {0, 0}
+#define MH_END {DEV_NONE, 0, MH_UNUSED, AMBA_PNP_ID(0, 0), 0, 0}
+
+/*********** Low Level Memory Controller Initalization Handlers ***********/
+
+#ifndef __ASSEMBLER__
+extern void _nomem_mctrl_init(
+ struct grlib_mctrl_handler *dev,
+ void *conf,
+ unsigned int ioarea_apbmst);
+
+struct mctrl_setup {
+ unsigned int reg_mask; /* Which registers to write */
+ struct {
+ unsigned int mask; /* Mask used keep reg bits unchanged */
+ unsigned int value; /* Value written to register */
+ } regs[8];
+};
+
+extern void _nomem_ahbmctrl_init(
+ struct grlib_mctrl_handler *dev,
+ void *conf,
+ unsigned int ioarea_apbmst);
+
+struct ahbmctrl_setup {
+ int ahb_mbar_no; /* MBAR to get register address from */
+ unsigned int reg_mask; /* Which registers to write */
+ struct {
+ unsigned int mask; /* Mask used keep reg bits unchanged */
+ unsigned int value; /* Value written to register */
+ } regs[8];
+};
+#endif
+
+/* mctrl_setup data structure defines */
+#define NREGS_OFS 0
+#define REGS_OFS 0x4
+#define REGS_SIZE 8
+
+#endif
diff --git a/arch/sparc/cpu/leon3/memcfg_low.S b/arch/sparc/cpu/leon3/memcfg_low.S
new file mode 100644
index 0000000..84a81a9
--- /dev/null
+++ b/arch/sparc/cpu/leon3/memcfg_low.S
@@ -0,0 +1,253 @@
+/* This is the memory initialization functions, the function
+ * implemented below initializes each memory controller
+ * found and specified by the input grlib_mctrl_handler structure.
+ *
+ * After the memory controllers have been initialized the stack
+ * can be used.
+ *
+ * (C) Copyright 2010, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <ambapp.h>
+#include "memcfg.h"
+#include <config.h>
+
+ .seg "text"
+ .globl _nomem_memory_ctrl_init
+ .globl _nomem_mctrl_init, _nomem_ahbmctrl_init
+ .extern _nomem_find_apb
+ .extern _nomem_find_ahb
+
+
+/* FUNCTION
+ * _nomem_memory_controller_init(struct grlib_mctrl_handler *mem_handlers)
+ *
+ * Initialize AMBA devices, _nomem_amba_init() has prepared i0-i5
+ * with the AHB buses on the system.
+ *
+ * For each entry in mem_handlers find the VENDOR:DEVICE and handle it
+ * by calling the handler function pointer.
+ *
+ * Constraints:
+ * i6, i7, o6, l7, l6, g3, g4, g5, g6, g7 is used by caller
+ * o7 is return address
+ * l5 reserved for this function for future use.
+ *
+ * Arguments
+ * - o0 Pointer to memory handler array
+ *
+ * Results
+ * - o0 Number of memory controllers found
+ *
+ * Clobbered
+ * - o0 (Current AHB slave conf address)
+ * - l0 (mem handler entry address)
+ * - l1 (Return value, number of memory controllers found)
+ * - o7 (function pointer)
+ * - l0, l1, l2, l3, l4, g1, g2 (used by _nomem_ambapp_find_buses)
+ * - o0, o1, o2, o3, o4, o5 (Used as arguments)
+ *
+ * - g1 ( level 1 return address)
+ * - g2 ( level 2 return address)
+ */
+
+_nomem_memory_ctrl_init:
+ /* At this point all AHB buses has been found and the I/O Areas of
+ * all AHB buses is stored in the i0-i5 registers. Max 6 buses. Next,
+ * memory controllers are found by searching all buses for matching
+ * VENDOR:DEVICE. The VENDOR:DEVICE to search for are taken from the
+ * mem_handlers array. For each match the function pointer stored in
+ * the mem_handler entry is called to handle the hardware setup.
+ */
+ mov %o7, %g1 /* Save return address */
+ mov %o0, %l0
+ mov %g0, %l1 /* The return value */
+
+.L_do_one_mem_handler:
+ ld [%l0 + MH_FUNC], %o7
+ cmp %o7, %g0
+ be .L_all_mctrl_handled
+ nop
+
+ /*** Scan for memory controller ***/
+
+ /* Set up argments, o5 not used by _nomem_find_apb */
+ ldub [%l0 + MH_TYPE], %o5
+ clr %o4
+ clr %o3
+ ldub [%l0 + MH_INDEX], %o2
+ ld [%l0 + MH_VENDOR_DEVICE], %o1
+
+ /* An empty config? */
+ cmp %o5, DEV_NONE
+ beq .L_all_mctrl_next
+
+ /* Select function (APB or AHB) */
+ cmp %o5, DEV_APB_SLV
+ bne .L_find_ahb_memctrl
+ clr %o0
+.L_find_apb_memctrl:
+ call _nomem_find_apb /* Scan for APB slave device */
+ nop
+
+ /* o3 = iobar address
+ * o4 = AHB Bus index
+ *
+ * REG ADR = ((iobar >> 12) & (iobar << 4) & 0xfff00) | "APB Base"
+ */
+ ld [%o3 + AMBA_APB_IOBAR_OFS], %o5
+ srl %o5, 12, %o2
+ sll %o5, 4, %o5
+ and %o2, %o5, %o5
+ set 0xfff00, %o2
+ and %o2, %o5, %o5
+ sethi %hi(0xfff00000), %o2
+ and %o3, %o2, %o2
+ or %o5, %o2, %o5 /* Register base address */
+
+ ba .L_call_one_mem_handler
+ nop
+
+.L_find_ahb_memctrl:
+ call _nomem_find_ahb /* Scan for AHB Slave or Master.
+ * o5 determine type. */
+ nop
+ clr %o5
+
+ /* Call the handler function if the hardware was found
+ *
+ * o0 = mem_handler
+ * o1 = Configuration address
+ * o2 = AHB Bus index
+ * o3 = APB Base register (if APB Slave)
+ *
+ * Constraints:
+ * i0-i7, l0, l1, l5, g1, g3-g7 may no be used.
+ */
+.L_call_one_mem_handler:
+ cmp %o0, %g0
+ be .L_all_mctrl_next
+ mov %l0, %o0 /* Mem handler pointer */
+ mov %o3, %o1 /* AMBA PnP Configuration address */
+ mov %o4, %o2 /* AHB Bus index */
+ ld [%l0 + MH_FUNC], %o7 /* Get Function pointer */
+ call %o7
+ mov %o5, %o3 /* APB Register Base Address */
+
+ inc %l1 /* Number of Memory controllers
+ * handled. */
+
+ /* Do next entry in mem_handlers */
+.L_all_mctrl_next:
+ ba .L_do_one_mem_handler
+ add %l0, MH_STRUCT_SIZE, %l0
+
+.L_all_mctrl_handled:
+ mov %g1, %o7 /* Restore return address */
+ retl
+ mov %l1, %o0
+
+
+
+/* Generic Memory controller initialization routine (APB Registers)
+ *
+ * o0 = mem_handler structure pointer
+ * o1 = Configuration address
+ * o2 = AHB Bus index
+ * o3 = APB Base register
+ *
+ * Clobbered
+ * o0-o4
+ */
+_nomem_mctrl_init:
+ ld [%o0 + MH_PRIV], %o0 /* Get Private structure */
+ ld [%o0], %o1 /* Get Reg Mask */
+ and %o1, 0xff, %o1
+ add %o0, REGS_OFS, %o0 /* Point to first reg */
+.L_do_one_reg:
+ andcc %o1, 0x1, %g0
+ beq .L_do_next_reg
+ ld [%o0], %o2
+ ld [%o3], %o4
+ and %o4, %o2, %o4
+ ld [%o0 + 4], %o2
+ or %o4, %o2, %o4
+ st %o4, [%o3]
+
+.L_do_next_reg:
+ add %o0, REGS_SIZE, %o0
+ add %o3, 4, %o3
+ srl %o1, 1, %o1
+ cmp %o1, 0
+ bne .L_do_one_reg
+ nop
+
+ /* No more registers to write */
+ retl
+ nop
+
+
+
+/* Generic Memory controller initialization routine (AHB Registers)
+ *
+ * o0 = mem_handler structure pointer
+ * o1 = Configuration address of memory controller
+ * o2 = AHB Bus index
+ *
+ * Clobbered
+ * o0-o5
+ */
+_nomem_ahbmctrl_init:
+ ld [%o0 + MH_PRIV], %o0 /* Get Private structure */
+
+ /* Get index of AHB MBAR to get registers from */
+ ld [%o0], %o5
+ add %o0, 4, %o0
+
+ /* Get Address of MBAR in PnP info */
+ add %o5, 4, %o5
+ sll %o5, 2, %o5
+ add %o5, %o1, %o5 /* Address of MBAR */
+
+ /* Get Address of registers from PnP information
+ * Address is in AHB I/O format, i.e. relative to bus
+ *
+ * ADR = (iobar & (iobar << 16) & 0xfff00000)
+ * IOADR = (ADR >> 12) | "APB Base"
+ */
+ ld [%o5], %o5
+ sll %o5, 16, %o4
+ and %o5, %o4, %o5
+ sethi %hi(0xfff00000), %o4
+ and %o5, %o4, %o5 /* ADR */
+ and %o4, %o1, %o4
+ srl %o5, 12, %o5
+ or %o5, %o4, %o3 /* IOADR in o3 */
+
+ ld [%o0], %o1 /* Get Reg Mask */
+ and %o1, 0xff, %o1
+ add %o0, REGS_OFS, %o0 /* Point to first reg */
+.L_do_one_ahbreg:
+ andcc %o1, 0x1, %g0
+ beq .L_do_next_reg
+ ld [%o0], %o2
+ ld [%o3], %o4
+ and %o4, %o2, %o4
+ ld [%o0 + 4], %o2
+ or %o4, %o2, %o4
+ st %o4, [%o3]
+
+.L_do_next_ahbreg:
+ add %o0, REGS_SIZE, %o0
+ add %o3, 4, %o3
+ srl %o1, 1, %o1
+ cmp %o1, 0
+ bne .L_do_one_reg
+ nop
+
+ /* No more registers to write */
+ retl
+ nop
diff --git a/arch/sparc/cpu/leon3/start.S b/arch/sparc/cpu/leon3/start.S
index be9b3fb..2031149 100644
--- a/arch/sparc/cpu/leon3/start.S
+++ b/arch/sparc/cpu/leon3/start.S
@@ -13,6 +13,12 @@
#include <asm/stack.h>
#include <asm/leon.h>
#include <version.h>
+#include <ambapp.h>
+
+/* Default Plug&Play I/O area */
+#ifndef CONFIG_AMBAPP_IOAREA
+#define CONFIG_AMBAPP_IOAREA AMBA_DEFAULT_IOAREA
+#endif
/* Entry for traps which jump to a programmer-specified trap handler. */
#define TRAPR(H) \
@@ -208,6 +214,7 @@
.ascii U_BOOT_VERSION_STRING, "\0"
.section ".text"
+ .extern _nomem_amba_init, _nomem_memory_ctrl_init
.align 4
_hardreset:
@@ -259,6 +266,38 @@
andn %fp, 0x0f, %fp
sub %fp, 64, %sp
+/* Obtain the address of _GLOBAL_OFFSET_TABLE_ */
+ SPARC_PIC_THUNK_CALL(l7)
+
+/* Scan AMBA Bus for AMBA buses using PnP information. All found
+ * AMBA buses I/O area will be located in i0-i5 upon return.
+ * The i0-i5 registers are later used by _nomem_amba_init2
+ */
+ambainit:
+ call _nomem_amba_init
+ sethi %hi(CONFIG_AMBAPP_IOAREA), %o0
+
+/* Scan AMBA Buses for memory controllers, then initialize the
+ * memory controllers. Note that before setting up the memory controller
+ * the stack can not be used.
+ */
+memory_ctrl_init:
+ SPARC_LOAD_ADDRESS(grlib_mctrl_handlers, l7, o0)
+
+ call _nomem_memory_ctrl_init
+ nop
+
+/* The return valu indicate how many memory controllers where found and
+ * initialized, if no memory controller was initialized, we can not continue
+ * because from here on we expect memory to be working.
+ */
+ cmp %o0, 0
+memory_ctrl_init_failed:
+ beq memory_ctrl_init_failed
+ nop
+
+/*** From now on the stack can be used. ***/
+
cpu_init_unreloc:
call cpu_init_f
nop
@@ -269,7 +308,6 @@
/* un relocated end address of monitor */
#define DATA_END __init_end
- SPARC_PIC_THUNK_CALL(l7)
reloc:
SPARC_LOAD_ADDRESS(TEXT_START, l7, g2)
SPARC_LOAD_ADDRESS(DATA_END, l7, g3)
@@ -389,6 +427,7 @@
SPARC_LOAD_ADDRESS(board_init_f, l7, o1)
set CONFIG_SYS_RELOC_MONITOR_BASE,%o2
+ SPARC_LOAD_ADDRESS(TEXT_START, l7, g1)
add %o1,%o2,%o1
sub %o1,%g1,%o1
call %o1