Commit d01e8897 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Russell King

[ARM] 3052/1: add ixp2000 microcode loader

Patch from Lennert Buytenhek

This patch adds a microcode loader for the ixp2000 architecture.

The ixp2000 is an xscale-based CPU with a number of additional small
CPUs ('microengines') on die that can be programmed to do various
things.  Depending on the ixp2000 model, there are between 2 and 16
microengines.

This code provides an API that allows configuring the microengines,
loading code into them, and starting and stopping them and reading
out a number of status registers, and is used by the microengine
network driver that was recently announced to netdev.
Signed-off-by: default avatarLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: default avatarDeepak Saxena <dsaxena@plexity.net>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent fadab094
# #
# Makefile for the linux kernel. # Makefile for the linux kernel.
# #
obj-y := core.o pci.o obj-y := core.o pci.o uengine.o
obj-m := obj-m :=
obj-n := obj-n :=
obj- := obj- :=
......
This diff is collapsed.
...@@ -59,14 +59,15 @@ ...@@ -59,14 +59,15 @@
#define IXP2000_CAP_SIZE 0x00100000 #define IXP2000_CAP_SIZE 0x00100000
/* /*
* Addresses for specific on-chip peripherals * Addresses for specific on-chip peripherals.
*/ */
#define IXP2000_SLOWPORT_CSR_VIRT_BASE 0xfef80000 #define IXP2000_SLOWPORT_CSR_VIRT_BASE 0xfef80000
#define IXP2000_GLOBAL_REG_VIRT_BASE 0xfef04000 #define IXP2000_GLOBAL_REG_VIRT_BASE 0xfef04000
#define IXP2000_UART_PHYS_BASE 0xc0030000 #define IXP2000_UART_PHYS_BASE 0xc0030000
#define IXP2000_UART_VIRT_BASE 0xfef30000 #define IXP2000_UART_VIRT_BASE 0xfef30000
#define IXP2000_TIMER_VIRT_BASE 0xfef20000 #define IXP2000_TIMER_VIRT_BASE 0xfef20000
#define IXP2000_GPIO_VIRT_BASE 0Xfef10000 #define IXP2000_UENGINE_CSR_VIRT_BASE 0xfef18000
#define IXP2000_GPIO_VIRT_BASE 0xfef10000
/* /*
* Devices outside of the 0xc0000000 -> 0xc0100000 range. The virtual * Devices outside of the 0xc0000000 -> 0xc0100000 range. The virtual
......
/*
* Generic library functions for the microengines found on the Intel
* IXP2000 series of network processors.
*
* Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
* Dedicated to Marija Kulikova.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*/
#ifndef __IXP2000_UENGINE_H
#define __IXP2000_UENGINE_H
extern u32 ixp2000_uengine_mask;
struct ixp2000_uengine_code
{
u32 cpu_model_bitmask;
u8 cpu_min_revision;
u8 cpu_max_revision;
u32 uengine_parameters;
struct ixp2000_reg_value {
int reg;
u32 value;
} *initial_reg_values;
int num_insns;
u8 *insns;
};
u32 ixp2000_uengine_csr_read(int uengine, int offset);
void ixp2000_uengine_csr_write(int uengine, int offset, u32 value);
void ixp2000_uengine_reset(u32 uengine_mask);
void ixp2000_uengine_set_mode(int uengine, u32 mode);
void ixp2000_uengine_load_microcode(int uengine, u8 *ucode, int insns);
void ixp2000_uengine_init_context(int uengine, int context, int pc);
void ixp2000_uengine_start_contexts(int uengine, u8 ctx_mask);
void ixp2000_uengine_stop_contexts(int uengine, u8 ctx_mask);
int ixp2000_uengine_load(int uengine, struct ixp2000_uengine_code *c);
#define IXP2000_UENGINE_8_CONTEXTS 0x00000000
#define IXP2000_UENGINE_4_CONTEXTS 0x80000000
#define IXP2000_UENGINE_PRN_UPDATE_EVERY 0x40000000
#define IXP2000_UENGINE_PRN_UPDATE_ON_ACCESS 0x00000000
#define IXP2000_UENGINE_NN_FROM_SELF 0x00100000
#define IXP2000_UENGINE_NN_FROM_PREVIOUS 0x00000000
#define IXP2000_UENGINE_ASSERT_EMPTY_AT_3 0x000c0000
#define IXP2000_UENGINE_ASSERT_EMPTY_AT_2 0x00080000
#define IXP2000_UENGINE_ASSERT_EMPTY_AT_1 0x00040000
#define IXP2000_UENGINE_ASSERT_EMPTY_AT_0 0x00000000
#define IXP2000_UENGINE_LM_ADDR1_GLOBAL 0x00020000
#define IXP2000_UENGINE_LM_ADDR1_PER_CONTEXT 0x00000000
#define IXP2000_UENGINE_LM_ADDR0_GLOBAL 0x00010000
#define IXP2000_UENGINE_LM_ADDR0_PER_CONTEXT 0x00000000
#endif
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