aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc/platforms/mbx.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/platforms/mbx.h')
-rw-r--r--arch/ppc/platforms/mbx.h117
1 files changed, 117 insertions, 0 deletions
diff --git a/arch/ppc/platforms/mbx.h b/arch/ppc/platforms/mbx.h
new file mode 100644
index 000000000000..fe81ca4ea0a2
--- /dev/null
+++ b/arch/ppc/platforms/mbx.h
@@ -0,0 +1,117 @@
+/*
+ * A collection of structures, addresses, and values associated with
+ * the Motorola MBX boards. This was originally created for the
+ * MBX860, and probably needs revisions for other boards (like the 821).
+ * When this file gets out of control, we can split it up into more
+ * meaningful pieces.
+ *
+ * Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
+ */
+#ifdef __KERNEL__
+#ifndef __MACH_MBX_DEFS
+#define __MACH_MBX_DEFS
+
+#ifndef __ASSEMBLY__
+/* A Board Information structure that is given to a program when
+ * EPPC-Bug starts it up.
+ */
+typedef struct bd_info {
+ unsigned int bi_tag; /* Should be 0x42444944 "BDID" */
+ unsigned int bi_size; /* Size of this structure */
+ unsigned int bi_revision; /* revision of this structure */
+ unsigned int bi_bdate; /* EPPCbug date, i.e. 0x11061997 */
+ unsigned int bi_memstart; /* Memory start address */
+ unsigned int bi_memsize; /* Memory (end) size in bytes */
+ unsigned int bi_intfreq; /* Internal Freq, in Hz */
+ unsigned int bi_busfreq; /* Bus Freq, in Hz */
+ unsigned int bi_clun; /* Boot device controller */
+ unsigned int bi_dlun; /* Boot device logical dev */
+
+ /* These fields are not part of the board information structure
+ * provided by the boot rom. They are filled in by embed_config.c
+ * so we have the information consistent with other platforms.
+ */
+ unsigned char bi_enetaddr[6];
+ unsigned int bi_baudrate;
+} bd_t;
+
+/* Memory map for the MBX as configured by EPPC-Bug. We could reprogram
+ * The SIU and PCI bridge, and try to use larger MMU pages, but the
+ * performance gain is not measureable and it certainly complicates the
+ * generic MMU model.
+ *
+ * In a effort to minimize memory usage for embedded applications, any
+ * PCI driver or ISA driver must request or map the region required by
+ * the device. For convenience (and since we can map up to 4 Mbytes with
+ * a single page table page), the MMU initialization will map the
+ * NVRAM, Status/Control registers, CPM Dual Port RAM, and the PCI
+ * Bridge CSRs 1:1 into the kernel address space.
+ */
+#define PCI_ISA_IO_ADDR ((unsigned)0x80000000)
+#define PCI_ISA_IO_SIZE ((uint)(512 * 1024 * 1024))
+#define PCI_IDE_ADDR ((unsigned)0x81000000)
+#define PCI_ISA_MEM_ADDR ((unsigned)0xc0000000)
+#define PCI_ISA_MEM_SIZE ((uint)(512 * 1024 * 1024))
+#define PCMCIA_MEM_ADDR ((uint)0xe0000000)
+#define PCMCIA_MEM_SIZE ((uint)(64 * 1024 * 1024))
+#define PCMCIA_DMA_ADDR ((uint)0xe4000000)
+#define PCMCIA_DMA_SIZE ((uint)(64 * 1024 * 1024))
+#define PCMCIA_ATTRB_ADDR ((uint)0xe8000000)
+#define PCMCIA_ATTRB_SIZE ((uint)(64 * 1024 * 1024))
+#define PCMCIA_IO_ADDR ((uint)0xec000000)
+#define PCMCIA_IO_SIZE ((uint)(64 * 1024 * 1024))
+#define NVRAM_ADDR ((uint)0xfa000000)
+#define NVRAM_SIZE ((uint)(1 * 1024 * 1024))
+#define MBX_CSR_ADDR ((uint)0xfa100000)
+#define MBX_CSR_SIZE ((uint)(1 * 1024 * 1024))
+#define IMAP_ADDR ((uint)0xfa200000)
+#define IMAP_SIZE ((uint)(64 * 1024))
+#define PCI_CSR_ADDR ((uint)0xfa210000)
+#define PCI_CSR_SIZE ((uint)(64 * 1024))
+
+/* Map additional physical space into well known virtual addresses. Due
+ * to virtual address mapping, these physical addresses are not accessible
+ * in a 1:1 virtual to physical mapping.
+ */
+#define ISA_IO_VIRT_ADDR ((uint)0xfa220000)
+#define ISA_IO_VIRT_SIZE ((uint)64 * 1024)
+
+/* Interrupt assignments.
+ * These are defined (and fixed) by the MBX hardware implementation.
+ */
+#define POWER_FAIL_INT SIU_IRQ0 /* Power fail */
+#define TEMP_HILO_INT SIU_IRQ1 /* Temperature sensor */
+#define QSPAN_INT SIU_IRQ2 /* PCI Bridge (DMA CTLR?) */
+#define ISA_BRIDGE_INT SIU_IRQ3 /* All those PC things */
+#define COMM_L_INT SIU_IRQ6 /* MBX Comm expansion connector pin */
+#define STOP_ABRT_INT SIU_IRQ7 /* Stop/Abort header pin */
+
+/* CPM Ethernet through SCCx.
+ *
+ * Bits in parallel I/O port registers that have to be set/cleared
+ * to configure the pins for SCC1 use. The TCLK and RCLK seem unique
+ * to the MBX860 board. Any two of the four available clocks could be
+ * used, and the MPC860 cookbook manual has an example using different
+ * clock pins.
+ */
+#define PA_ENET_RXD ((ushort)0x0001)
+#define PA_ENET_TXD ((ushort)0x0002)
+#define PA_ENET_TCLK ((ushort)0x0200)
+#define PA_ENET_RCLK ((ushort)0x0800)
+#define PC_ENET_TENA ((ushort)0x0001)
+#define PC_ENET_CLSN ((ushort)0x0010)
+#define PC_ENET_RENA ((ushort)0x0020)
+
+/* Control bits in the SICR to route TCLK (CLK2) and RCLK (CLK4) to
+ * SCC1. Also, make sure GR1 (bit 24) and SC1 (bit 25) are zero.
+ */
+#define SICR_ENET_MASK ((uint)0x000000ff)
+#define SICR_ENET_CLKRT ((uint)0x0000003d)
+
+/* The MBX uses the 8259.
+*/
+#define NR_8259_INTS 16
+
+#endif /* !__ASSEMBLY__ */
+#endif /* __MACH_MBX_DEFS */
+#endif /* __KERNEL__ */