Message-ID: <19b00b69-90dd-4fba-b9f7-2f8c7b40fb9a@VA3EHSMHS017.ehs.local>
Date:	Sat, 5 Feb 2011 09:17:17 -0700
From:	John Linn <john.linn@...inx.com>
To:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux@....linux.org.uk>,
	<catalin.marinas@....com>, <glikely@...retlab.ca>
CC:	John Linn <john.linn@...inx.com>
Subject: [PATCH 4/4] ARM: Xilinx: base header files and assembly macros

These are the minimum needed to build the kernel for the new platform.

Signed-off-by: John Linn <john.linn@...inx.com>
---
 arch/arm/mach-xilinx/include/mach/clkdev.h      |   33 +++++++++
 arch/arm/mach-xilinx/include/mach/debug-macro.S |   36 +++++++++
 arch/arm/mach-xilinx/include/mach/entry-macro.S |   87 +++++++++++++++++++++++
 arch/arm/mach-xilinx/include/mach/hardware.h    |   44 ++++++++++++
 arch/arm/mach-xilinx/include/mach/io.h          |   27 +++++++
 arch/arm/mach-xilinx/include/mach/irqs.h        |   28 +++++++
 arch/arm/mach-xilinx/include/mach/memory.h      |   23 ++++++
 arch/arm/mach-xilinx/include/mach/system.h      |   28 +++++++
 arch/arm/mach-xilinx/include/mach/timex.h       |   22 ++++++
 arch/arm/mach-xilinx/include/mach/uart.h        |   30 ++++++++
 arch/arm/mach-xilinx/include/mach/uncompress.h  |   46 ++++++++++++
 arch/arm/mach-xilinx/include/mach/vmalloc.h     |   20 +++++
 12 files changed, 424 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-xilinx/include/mach/clkdev.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/debug-macro.S
 create mode 100644 arch/arm/mach-xilinx/include/mach/entry-macro.S
 create mode 100644 arch/arm/mach-xilinx/include/mach/hardware.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/io.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/irqs.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/memory.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/system.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/timex.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/uart.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/uncompress.h
 create mode 100644 arch/arm/mach-xilinx/include/mach/vmalloc.h

diff --git a/arch/arm/mach-xilinx/include/mach/clkdev.h b/arch/arm/mach-xilinx/include/mach/clkdev.h
new file mode 100644
index 0000000..5dd1453
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/clkdev.h
@@ -0,0 +1,33 @@
+/*
+ * arch/arm/mach-xilinx/include/mach/clkdev.h
+ *
+ *  Copyright (C) 2011 Xilinx, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __MACH_CLKDEV_H__
+#define __MACH_CLKDEV_H__
+
+struct clk {
+	unsigned long rate;
+};
+
+static inline int __clk_get(struct clk *clk)
+{
+	return 1;
+}
+
+static inline void __clk_put(struct clk *clk)
+{
+}
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/debug-macro.S b/arch/arm/mach-xilinx/include/mach/debug-macro.S
new file mode 100644
index 0000000..db16b13
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/debug-macro.S
@@ -0,0 +1,36 @@
+/* arch/arm/mach-xilinx/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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 <mach/hardware.h>
+#include <mach/uart.h>
+
+		.macro	addruart, rp, rv
+		ldr	\rp, =LL_UART_PADDR	@ physical
+		ldr	\rv, =LL_UART_VADDR	@ virtual
+		.endm
+
+		.macro	senduart,rd,rx
+		str	\rd, [\rx, #UART_FIFO_OFFSET]	@ TXDATA
+		.endm
+
+		.macro	waituart,rd,rx
+		.endm
+
+		.macro	busyuart,rd,rx
+1002:		ldr	\rd, [\rx, #UART_SR_OFFSET]	@ get status register
+		tst	\rd, #UART_SR_TXFULL		@
+		bne	1002b			@ wait if FIFO is full
+		.endm
diff --git a/arch/arm/mach-xilinx/include/mach/entry-macro.S b/arch/arm/mach-xilinx/include/mach/entry-macro.S
new file mode 100644
index 0000000..becb4cd
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/entry-macro.S
@@ -0,0 +1,87 @@
+/*
+ * arch/arm/mach-xilinx/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * based on arch/plat-mxc/include/mach/entry-macro.S
+ *
+ *  Copyright (C) 2007 Lennert Buytenhek <buytenh@...tstofly.org>
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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.
+ *
+ * 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 <mach/hardware.h>
+#include <asm/hardware/gic.h>
+
+		.macro	disable_fiq
+		.endm
+
+		.macro  get_irqnr_preamble, base, tmp
+		ldr	\base, =gic_cpu_base_addr
+		ldr	\base, [\base]
+		.endm
+
+		.macro  arch_ret_to_user, tmp1, tmp2
+		.endm
+
+		/*
+		 * The interrupt numbering scheme is defined in the
+		 * interrupt controller spec.
+		 *
+		 * Interrupts 0-15 are SFI and are filtered
+		 * Interrupts 31-1019 are normal and should be processed
+		 * 1020-1021 are reserved and are filtered
+		 * 1022 is not needed and filtered
+		 * 1023 is "spurious" (no interrupt) and is filtered
+		 *
+		 * A simple read from the controller will tell us the number
+		 * of the highest priority enabled interrupt.  We then just
+		 * need to check whether it is in the valid range for an IRQ
+		 * (16-1019 inclusive). If a valid interrupt, Z = 0 on return.
+		 */
+
+		.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+		/* bits 12-10 = src CPU, 9-0 = int # */
+
+		ldr     \irqstat, [\base, #GIC_CPU_INTACK]
+		ldr	\tmp, =1020
+
+		bic     \irqnr, \irqstat, #0x1c00
+
+		cmp     \irqnr, #31
+		cmpcc	\irqnr, \irqnr
+		cmpne	\irqnr, \tmp
+		cmpcs	\irqnr, \irqnr
+
+		.endm
+
+		.macro test_for_ipi, irqnr, irqstat, base, tmp
+		bic	\irqnr, \irqstat, #0x1c00
+		cmp	\irqnr, #16
+		it	cc
+		strcc	\irqstat, [\base, #GIC_CPU_EOI]
+		it	cs
+		cmpcs	\irqnr, \irqnr
+		.endm
+
+		/* As above, this assumes irqstat and base are preserved */
+
+		.macro test_for_ltirq, irqnr, irqstat, base, tmp
+		bic	\irqnr, \irqstat, #0x1c00
+		mov 	\tmp, #0
+		cmp	\irqnr, #29
+		itt	eq
+		moveq	\tmp, #1
+		streq	\irqstat, [\base, #GIC_CPU_EOI]
+		cmp	\tmp, #0
+		.endm
diff --git a/arch/arm/mach-xilinx/include/mach/hardware.h b/arch/arm/mach-xilinx/include/mach/hardware.h
new file mode 100644
index 0000000..a635322
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/hardware.h
@@ -0,0 +1,44 @@
+/* arch/arm/mach-xilinx/include/mach/hardware.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_HARDWARE_H__
+#define __MACH_HARDWARE_H__
+
+#include <mach/memory.h>
+#include <mach/irqs.h>
+
+#define PERIPHERAL_CLOCK_RATE	2500000
+
+#define IO_BASE			0xE0000000
+#define UART0_BASE		(IO_BASE)
+
+#define PERIPH_BASE		0xF8000000
+#define TTC0_BASE		(PERIPH_BASE + 0x1000)
+
+#define SCU_PERIPH_BASE		0xF8F00000
+#define SCU_GIC_CPU_BASE	(SCU_PERIPH_BASE + 0x100)
+#define SCU_GLOBAL_TIMER_BASE	(SCU_PERIPH_BASE + 0x200)
+#define SCU_CPU_TIMER_BASE	(SCU_PERIPH_BASE + 0x600)
+#define SCU_WDT_BASE		(SCU_PERIPH_BASE + 0x620)
+#define SCU_GIC_DIST_BASE	(SCU_PERIPH_BASE + 0x1000)
+
+#define PL310_L2CC_BASE		0xF8F02000
+
+/*
+ * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
+ */
+#define LL_UART_PADDR	UART0_BASE
+#define LL_UART_VADDR	UART0_BASE
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/io.h b/arch/arm/mach-xilinx/include/mach/io.h
new file mode 100644
index 0000000..2e69db7
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/io.h
@@ -0,0 +1,27 @@
+/* arch/arm/mach-xilinx/include/mach/io.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_IO_H__
+#define __MACH_IO_H__
+
+/* Allow IO space to be anywhere in the memory */
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/* IO address mapping macros, nothing special at this time but required */
+
+#define __io(a)			((void __iomem *)(a))
+#define __mem_pci(a)		(a)
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/irqs.h b/arch/arm/mach-xilinx/include/mach/irqs.h
new file mode 100644
index 0000000..da2fadc
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/irqs.h
@@ -0,0 +1,28 @@
+/* arch/arm/mach-xilinx/include/mach/irqs.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+#ifndef __MACH_IRQS_H
+#define __MACH_IRQS_H
+
+#define ARCH_NR_GPIOS	118
+#define NR_IRQS		(128 + ARCH_NR_GPIOS)
+
+/*
+ * GIC Interrupts
+ */
+
+#define IRQ_GIC_SPI_START	32
+#define IRQ_TIMERCOUNTER0	42
+#define IRQ_UART0		59
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/memory.h b/arch/arm/mach-xilinx/include/mach/memory.h
new file mode 100644
index 0000000..2b6d1eb
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/memory.h
@@ -0,0 +1,23 @@
+/* arch/arm/mach-xilinx/include/mach/memory.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_MEMORY_H__
+#define __MACH_MEMORY_H__
+
+#include <mach/hardware.h>
+
+#define PHYS_OFFSET             0x0
+#define MEM_SIZE		SZ_256M
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/system.h b/arch/arm/mach-xilinx/include/mach/system.h
new file mode 100644
index 0000000..a5f1f0f
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/system.h
@@ -0,0 +1,28 @@
+/* arch/arm/mach-xilinx/include/mach/system.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_SYSTEM_H__
+#define __MACH_SYSTEM_H__
+
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+static inline void arch_reset(char mode, const char *cmd)
+{
+	/* Add architecture specific reset processing here */
+}
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/timex.h b/arch/arm/mach-xilinx/include/mach/timex.h
new file mode 100644
index 0000000..0c1d292
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/timex.h
@@ -0,0 +1,22 @@
+/* arch/arm/mach-xilinx/include/mach/timex.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_TIMEX_H__
+#define __MACH_TIMEX_H__
+
+#include <mach/hardware.h>
+
+#define CLOCK_TICK_RATE	(PERIPHERAL_CLOCK_RATE / 32)
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/uart.h b/arch/arm/mach-xilinx/include/mach/uart.h
new file mode 100644
index 0000000..2601143
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/uart.h
@@ -0,0 +1,30 @@
+/* arch/arm/mach-xilinx/include/mach/uart.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+#ifndef __MACH_UART_H__
+#define __MACH_UART_H__
+
+#define UART_CR_OFFSET          0x00  /* Control Register [8:0] */
+#define UART_SR_OFFSET          0x2C  /* Channel Status [11:0] */
+#define UART_FIFO_OFFSET        0x30  /* FIFO [15:0] or [7:0] */
+
+#define UART_SR_TXFULL		0x00000010	/* TX FIFO full */
+#define UART_SR_TXEMPTY		0x00000008	/* TX FIFO empty */
+
+#define UART_FIFO_WRITE(base, value) \
+	(*(volatile unsigned int *)((base) + UART_FIFO_OFFSET) = (value))
+
+#define UART_STATUS(base) \
+	(*(volatile unsigned int *)((base) + UART_SR_OFFSET))
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/uncompress.h b/arch/arm/mach-xilinx/include/mach/uncompress.h
new file mode 100644
index 0000000..3a4aef7
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/uncompress.h
@@ -0,0 +1,46 @@
+/* arch/arm/mach-xilinx/include/mach/uncompress.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+#ifndef __MACH_UNCOMPRESS_H__
+#define __MACH_UNCOMPRESS_H__
+
+#include <mach/hardware.h>
+#include <mach/uart.h>
+
+void arch_decomp_setup(void)
+{
+}
+
+static inline void flush(void)
+{
+	/*
+	 * Wait while the FIFO is not empty
+	 */
+	while (!(UART_STATUS(LL_UART_PADDR) & UART_SR_TXEMPTY))
+		;
+}
+
+#define arch_decomp_wdog()
+
+static void putc(char ch)
+{
+	/*
+	 * Wait for room in the FIFO, then write the char into the FIFO
+	 */
+	while (UART_STATUS(LL_UART_PADDR) & UART_SR_TXFULL)
+		;
+
+	UART_FIFO_WRITE(LL_UART_PADDR, ch);
+}
+
+#endif
diff --git a/arch/arm/mach-xilinx/include/mach/vmalloc.h b/arch/arm/mach-xilinx/include/mach/vmalloc.h
new file mode 100644
index 0000000..b70ff29
--- /dev/null
+++ b/arch/arm/mach-xilinx/include/mach/vmalloc.h
@@ -0,0 +1,20 @@
+/* arch/arm/mach-xilinx/include/mach/vmalloc.h
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * 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.
+ *
+ * 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
+ */
+
+#ifndef __MACH_VMALLOC_H__
+#define __MACH_VMALLOC_H__
+
+#define VMALLOC_END       IO_BASE
+
+#endif
-- 
1.6.2.1



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