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Message-ID: <20110228111839.GA9206@pulham.picochip.com>
Date: Mon, 28 Feb 2011 11:18:39 +0000
From: Jamie Iles <jamie@...ieiles.com>
To: John Linn <john.linn@...inx.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux@....linux.org.uk, catalin.marinas@....com,
glikely@...retlab.ca, jamie@...ieiles.com, arnd@...db.de
Subject: Re: [PATCH V4 3/4] ARM: Xilinx: base header files and assembly macros
Hi John,
One more pedantic nitpick, but nothing major!
Jamie
On Fri, Feb 18, 2011 at 11:14:40AM -0700, John Linn wrote:
> These are the minimum needed to build the kernel for the new platform.
>
> Signed-off-by: John Linn <john.linn@...inx.com>
> ---
>
> V4 Changes
>
> Cleanup based on input from Jamie Iles.
> Moved to PLAT_PHYS_OFFSET.
> Remove headers file inclusions that weren't needed.
> Added use of raw_readl/raw_writel in uncompressor uart code.
> Added cpu_relax() in the uncompressor uart code.
>
> V3 Changes
>
> Updates based on Russell Kings' comments
> Changed headers to update the license info and remove
> the address
>
> Updated the constant to use UL in vmalloc.h
>
> V2 Changes
>
> Updates based on Russell King's comments
> moved to using entry-macro-gic.S
> moved stuff from hardware.h to xilinx_soc.h
> added IOMEM() in io.h to help with typing
> Minor updates to IO_SPACE_LIMIT and __io()
> Updated addresses to be clear with seperate virtual
> and physical addresses
>
> 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 | 30 +++++++++++
> arch/arm/mach-xilinx/include/mach/hardware.h | 18 +++++++
> arch/arm/mach-xilinx/include/mach/io.h | 33 ++++++++++++
> arch/arm/mach-xilinx/include/mach/irqs.h | 29 +++++++++++
> 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 | 25 +++++++++
> arch/arm/mach-xilinx/include/mach/uncompress.h | 61 +++++++++++++++++++++++
> arch/arm/mach-xilinx/include/mach/vmalloc.h | 20 +++++++
> arch/arm/mach-xilinx/include/mach/xilinx_soc.h | 46 +++++++++++++++++
> 13 files changed, 404 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
> create mode 100644 arch/arm/mach-xilinx/include/mach/xilinx_soc.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..30d3d3d
> --- /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 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.
> + */
> +
> +#include <mach/xilinx_soc.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..11a2866
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/entry-macro.S
> @@ -0,0 +1,30 @@
> +/*
> + * 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 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.
> + */
> +
> +#include <mach/hardware.h>
> +#include <asm/hardware/entry-macro-gic.S>
> +
> + .macro disable_fiq
> + .endm
> +
> + .macro arch_ret_to_user, tmp1, tmp2
> + .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..f9685c4
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/hardware.h
> @@ -0,0 +1,18 @@
> +/* arch/arm/mach-xilinx/include/mach/hardware.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_HARDWARE_H__
> +#define __MACH_HARDWARE_H__
> +
> +#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..ef69e65
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/io.h
> @@ -0,0 +1,33 @@
> +/* arch/arm/mach-xilinx/include/mach/io.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_IO_H__
> +#define __MACH_IO_H__
> +
> +/* Allow IO space to be anywhere in the memory */
> +
> +#define IO_SPACE_LIMIT 0xffff
> +
> +/* IO address mapping macros, nothing special at this time but required */
> +
> +#ifdef __ASSEMBLER__
> +#define IOMEM(x) (x)
> +#else
> +#define IOMEM(x) ((void __force __iomem *)(x))
> +#endif
> +
> +#define __io(a) __typesafe_io(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..47a8162
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/irqs.h
> @@ -0,0 +1,29 @@
> +/* arch/arm/mach-xilinx/include/mach/irqs.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_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..3efde15
> --- /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 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_MEMORY_H__
> +#define __MACH_MEMORY_H__
> +
> +#include <asm/sizes.h>
> +
> +#define PHYS_OFFSET UL(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..e8514a0
> --- /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 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_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..4ebc0a6
> --- /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 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_TIMEX_H__
> +#define __MACH_TIMEX_H__
> +
> +#define PERIPHERAL_CLOCK_RATE 2500000
> +
> +#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..7fca361
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/uart.h
> @@ -0,0 +1,25 @@
> +/* arch/arm/mach-xilinx/include/mach/uart.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_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 */
> +
> +#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..ff3754c
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/uncompress.h
> @@ -0,0 +1,61 @@
> +/* arch/arm/mach-xilinx/include/mach/uncompress.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_UNCOMPRESS_H__
> +#define __MACH_UNCOMPRESS_H__
> +
> +#include <mach/xilinx_soc.h>
> +#include <mach/uart.h>
> +#include <asm/processor.h>
> +#include <asm/io.h>
> +#include <mach/io.h>
> +
> +void arch_decomp_setup(void)
> +{
> +}
> +
> +static inline void flush(void)
> +{
> + u32 status;
> + /*
> + * Wait while the FIFO is not empty
> + */
> + while (1) {
> + status = __raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET));
> + if (status & UART_SR_TXEMPTY)
> + break;
> + cpu_relax();
> + }
This could be written as:
static inline void flush(void)
{
while (!(__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
UART_SR_TXEMPTY))
cpu_relax();
}
> +}
> +
> +#define arch_decomp_wdog()
> +
> +static void putc(char ch)
> +{
> + u32 status;
> +
> + /*
> + * Wait for room in the FIFO, then write the char into the FIFO
> + */
> + while (1) {
> + status = __raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET));
> + if (!(status & UART_SR_TXFULL))
> + break;
> + cpu_relax();
> + }
> +
> + __raw_writel(ch, IOMEM(LL_UART_PADDR + UART_FIFO_OFFSET));
> +}
static void putch(char ch)
{
while (__raw_readl(IOMEM(LL_UART_PADDR + UART_SR_OFFSET)) &
UART_SR_TXFULL)
cpu_relax();
__raw_writel(ch, IOMEM(LL_UART_PADDR + UART_FIFO_OFFSET));
}
> +
> +#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..aba20a3
> --- /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 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_VMALLOC_H__
> +#define __MACH_VMALLOC_H__
> +
> +#define VMALLOC_END 0xE0000000UL
> +
> +#endif
> diff --git a/arch/arm/mach-xilinx/include/mach/xilinx_soc.h b/arch/arm/mach-xilinx/include/mach/xilinx_soc.h
> new file mode 100644
> index 0000000..d01cde1
> --- /dev/null
> +++ b/arch/arm/mach-xilinx/include/mach/xilinx_soc.h
> @@ -0,0 +1,46 @@
> +/* arch/arm/mach-xilinx/include/mach/xilinx_soc.h
> + *
> + * Copyright (C) 2011 Xilinx
> + *
> + * 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_XILINX_SOC_H__
> +#define __MACH_XILINX_SOC_H__
> +
> +/* For now, all mappings are flat (physical = virtual)
> + */
> +#define UART0_PHYS 0xE0000000
> +#define UART0_VIRT UART0_PHYS
> +
> +#define TTC0_PHYS 0xF8001000
> +#define TTC0_VIRT TTC0_PHYS
> +
> +#define PL310_L2CC_PHYS 0xF8F02000
> +#define PL310_L2CC_VIRT PL310_L2CC_PHYS
> +
> +#define SCU_PERIPH_PHYS 0xF8F00000
> +#define SCU_PERIPH_VIRT SCU_PERIPH_PHYS
> +
> +/* The following are intended for the devices that are mapped early */
> +
> +#define TTC0_BASE IOMEM(TTC0_VIRT)
> +#define SCU_PERIPH_BASE IOMEM(SCU_PERIPH_VIRT)
> +#define SCU_GIC_CPU_BASE (SCU_PERIPH_BASE + 0x100)
> +#define SCU_GIC_DIST_BASE (SCU_PERIPH_BASE + 0x1000)
> +#define PL310_L2CC_BASE IOMEM(PL310_L2CC_VIRT)
> +
> +/*
> + * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
> + */
> +#define LL_UART_PADDR UART0_PHYS
> +#define LL_UART_VADDR UART0_VIRT
> +
> +#endif
> --
> 1.6.2.1
>
>
>
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>
>
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