summaryrefslogtreecommitdiffstats
path: root/arch/arm/common/uengine.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/common/uengine.c')
-rw-r--r--arch/arm/common/uengine.c507
1 files changed, 0 insertions, 507 deletions
diff --git a/arch/arm/common/uengine.c b/arch/arm/common/uengine.c
deleted file mode 100644
index bef408f..0000000
--- a/arch/arm/common/uengine.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/io.h>
-#include <mach/hardware.h>
-#include <asm/hardware/uengine.h>
-
-#if defined(CONFIG_ARCH_IXP2000)
-#define IXP_UENGINE_CSR_VIRT_BASE IXP2000_UENGINE_CSR_VIRT_BASE
-#define IXP_PRODUCT_ID IXP2000_PRODUCT_ID
-#define IXP_MISC_CONTROL IXP2000_MISC_CONTROL
-#define IXP_RESET1 IXP2000_RESET1
-#else
-#if defined(CONFIG_ARCH_IXP23XX)
-#define IXP_UENGINE_CSR_VIRT_BASE IXP23XX_UENGINE_CSR_VIRT_BASE
-#define IXP_PRODUCT_ID IXP23XX_PRODUCT_ID
-#define IXP_MISC_CONTROL IXP23XX_MISC_CONTROL
-#define IXP_RESET1 IXP23XX_RESET1
-#else
-#error unknown platform
-#endif
-#endif
-
-#define USTORE_ADDRESS 0x000
-#define USTORE_DATA_LOWER 0x004
-#define USTORE_DATA_UPPER 0x008
-#define CTX_ENABLES 0x018
-#define CC_ENABLE 0x01c
-#define CSR_CTX_POINTER 0x020
-#define INDIRECT_CTX_STS 0x040
-#define ACTIVE_CTX_STS 0x044
-#define INDIRECT_CTX_SIG_EVENTS 0x048
-#define INDIRECT_CTX_WAKEUP_EVENTS 0x050
-#define NN_PUT 0x080
-#define NN_GET 0x084
-#define TIMESTAMP_LOW 0x0c0
-#define TIMESTAMP_HIGH 0x0c4
-#define T_INDEX_BYTE_INDEX 0x0f4
-#define LOCAL_CSR_STATUS 0x180
-
-u32 ixp2000_uengine_mask;
-
-static void *ixp2000_uengine_csr_area(int uengine)
-{
- return ((void *)IXP_UENGINE_CSR_VIRT_BASE) + (uengine << 10);
-}
-
-/*
- * LOCAL_CSR_STATUS=1 after a read or write to a microengine's CSR
- * space means that the microengine we tried to access was also trying
- * to access its own CSR space on the same clock cycle as we did. When
- * this happens, we lose the arbitration process by default, and the
- * read or write we tried to do was not actually performed, so we try
- * again until it succeeds.
- */
-u32 ixp2000_uengine_csr_read(int uengine, int offset)
-{
- void *uebase;
- u32 *local_csr_status;
- u32 *reg;
- u32 value;
-
- uebase = ixp2000_uengine_csr_area(uengine);
-
- local_csr_status = (u32 *)(uebase + LOCAL_CSR_STATUS);
- reg = (u32 *)(uebase + offset);
- do {
- value = ixp2000_reg_read(reg);
- } while (ixp2000_reg_read(local_csr_status) & 1);
-
- return value;
-}
-EXPORT_SYMBOL(ixp2000_uengine_csr_read);
-
-void ixp2000_uengine_csr_write(int uengine, int offset, u32 value)
-{
- void *uebase;
- u32 *local_csr_status;
- u32 *reg;
-
- uebase = ixp2000_uengine_csr_area(uengine);
-
- local_csr_status = (u32 *)(uebase + LOCAL_CSR_STATUS);
- reg = (u32 *)(uebase + offset);
- do {
- ixp2000_reg_write(reg, value);
- } while (ixp2000_reg_read(local_csr_status) & 1);
-}
-EXPORT_SYMBOL(ixp2000_uengine_csr_write);
-
-void ixp2000_uengine_reset(u32 uengine_mask)
-{
- u32 value;
-
- value = ixp2000_reg_read(IXP_RESET1) & ~ixp2000_uengine_mask;
-
- uengine_mask &= ixp2000_uengine_mask;
- ixp2000_reg_wrb(IXP_RESET1, value | uengine_mask);
- ixp2000_reg_wrb(IXP_RESET1, value);
-}
-EXPORT_SYMBOL(ixp2000_uengine_reset);
-
-void ixp2000_uengine_set_mode(int uengine, u32 mode)
-{
- /*
- * CTL_STR_PAR_EN: unconditionally enable parity checking on
- * control store.
- */
- mode |= 0x10000000;
- ixp2000_uengine_csr_write(uengine, CTX_ENABLES, mode);
-
- /*
- * Enable updating of condition codes.
- */
- ixp2000_uengine_csr_write(uengine, CC_ENABLE, 0x00002000);
-
- /*
- * Initialise other per-microengine registers.
- */
- ixp2000_uengine_csr_write(uengine, NN_PUT, 0x00);
- ixp2000_uengine_csr_write(uengine, NN_GET, 0x00);
- ixp2000_uengine_csr_write(uengine, T_INDEX_BYTE_INDEX, 0);
-}
-EXPORT_SYMBOL(ixp2000_uengine_set_mode);
-
-static int make_even_parity(u32 x)
-{
- return hweight32(x) & 1;
-}
-
-static void ustore_write(int uengine, u64 insn)
-{
- /*
- * Generate even parity for top and bottom 20 bits.
- */
- insn |= (u64)make_even_parity((insn >> 20) & 0x000fffff) << 41;
- insn |= (u64)make_even_parity(insn & 0x000fffff) << 40;
-
- /*
- * Write to microstore. The second write auto-increments
- * the USTORE_ADDRESS index register.
- */
- ixp2000_uengine_csr_write(uengine, USTORE_DATA_LOWER, (u32)insn);
- ixp2000_uengine_csr_write(uengine, USTORE_DATA_UPPER, (u32)(insn >> 32));
-}
-
-void ixp2000_uengine_load_microcode(int uengine, u8 *ucode, int insns)
-{
- int i;
-
- /*
- * Start writing to microstore at address 0.
- */
- ixp2000_uengine_csr_write(uengine, USTORE_ADDRESS, 0x80000000);
- for (i = 0; i < insns; i++) {
- u64 insn;
-
- insn = (((u64)ucode[0]) << 32) |
- (((u64)ucode[1]) << 24) |
- (((u64)ucode[2]) << 16) |
- (((u64)ucode[3]) << 8) |
- ((u64)ucode[4]);
- ucode += 5;
-
- ustore_write(uengine, insn);
- }
-
- /*
- * Pad with a few NOPs at the end (to avoid the microengine
- * aborting as it prefetches beyond the last instruction), unless
- * we run off the end of the instruction store first, at which
- * point the address register will wrap back to zero.
- */
- for (i = 0; i < 4; i++) {
- u32 addr;
-
- addr = ixp2000_uengine_csr_read(uengine, USTORE_ADDRESS);
- if (addr == 0x80000000)
- break;
- ustore_write(uengine, 0xf0000c0300ULL);
- }
-
- /*
- * End programming.
- */
- ixp2000_uengine_csr_write(uengine, USTORE_ADDRESS, 0x00000000);
-}
-EXPORT_SYMBOL(ixp2000_uengine_load_microcode);
-
-void ixp2000_uengine_init_context(int uengine, int context, int pc)
-{
- /*
- * Select the right context for indirect access.
- */
- ixp2000_uengine_csr_write(uengine, CSR_CTX_POINTER, context);
-
- /*
- * Initialise signal masks to immediately go to Ready state.
- */
- ixp2000_uengine_csr_write(uengine, INDIRECT_CTX_SIG_EVENTS, 1);
- ixp2000_uengine_csr_write(uengine, INDIRECT_CTX_WAKEUP_EVENTS, 1);
-
- /*
- * Set program counter.
- */
- ixp2000_uengine_csr_write(uengine, INDIRECT_CTX_STS, pc);
-}
-EXPORT_SYMBOL(ixp2000_uengine_init_context);
-
-void ixp2000_uengine_start_contexts(int uengine, u8 ctx_mask)
-{
- u32 mask;
-
- /*
- * Enable the specified context to go to Executing state.
- */
- mask = ixp2000_uengine_csr_read(uengine, CTX_ENABLES);
- mask |= ctx_mask << 8;
- ixp2000_uengine_csr_write(uengine, CTX_ENABLES, mask);
-}
-EXPORT_SYMBOL(ixp2000_uengine_start_contexts);
-
-void ixp2000_uengine_stop_contexts(int uengine, u8 ctx_mask)
-{
- u32 mask;
-
- /*
- * Disable the Ready->Executing transition. Note that this
- * does not stop the context until it voluntarily yields.
- */
- mask = ixp2000_uengine_csr_read(uengine, CTX_ENABLES);
- mask &= ~(ctx_mask << 8);
- ixp2000_uengine_csr_write(uengine, CTX_ENABLES, mask);
-}
-EXPORT_SYMBOL(ixp2000_uengine_stop_contexts);
-
-static int check_ixp_type(struct ixp2000_uengine_code *c)
-{
- u32 product_id;
- u32 rev;
-
- product_id = ixp2000_reg_read(IXP_PRODUCT_ID);
- if (((product_id >> 16) & 0x1f) != 0)
- return 0;
-
- switch ((product_id >> 8) & 0xff) {
-#ifdef CONFIG_ARCH_IXP2000
- case 0: /* IXP2800 */
- if (!(c->cpu_model_bitmask & 4))
- return 0;
- break;
-
- case 1: /* IXP2850 */
- if (!(c->cpu_model_bitmask & 8))
- return 0;
- break;
-
- case 2: /* IXP2400 */
- if (!(c->cpu_model_bitmask & 2))
- return 0;
- break;
-#endif
-
-#ifdef CONFIG_ARCH_IXP23XX
- case 4: /* IXP23xx */
- if (!(c->cpu_model_bitmask & 0x3f0))
- return 0;
- break;
-#endif
-
- default:
- return 0;
- }
-
- rev = product_id & 0xff;
- if (rev < c->cpu_min_revision || rev > c->cpu_max_revision)
- return 0;
-
- return 1;
-}
-
-static void generate_ucode(u8 *ucode, u32 *gpr_a, u32 *gpr_b)
-{
- int offset;
- int i;
-
- offset = 0;
-
- for (i = 0; i < 128; i++) {
- u8 b3;
- u8 b2;
- u8 b1;
- u8 b0;
-
- b3 = (gpr_a[i] >> 24) & 0xff;
- b2 = (gpr_a[i] >> 16) & 0xff;
- b1 = (gpr_a[i] >> 8) & 0xff;
- b0 = gpr_a[i] & 0xff;
-
- /* immed[@ai, (b1 << 8) | b0] */
- /* 11110000 0000VVVV VVVV11VV VVVVVV00 1IIIIIII */
- ucode[offset++] = 0xf0;
- ucode[offset++] = (b1 >> 4);
- ucode[offset++] = (b1 << 4) | 0x0c | (b0 >> 6);
- ucode[offset++] = (b0 << 2);
- ucode[offset++] = 0x80 | i;
-
- /* immed_w1[@ai, (b3 << 8) | b2] */
- /* 11110100 0100VVVV VVVV11VV VVVVVV00 1IIIIIII */
- ucode[offset++] = 0xf4;
- ucode[offset++] = 0x40 | (b3 >> 4);
- ucode[offset++] = (b3 << 4) | 0x0c | (b2 >> 6);
- ucode[offset++] = (b2 << 2);
- ucode[offset++] = 0x80 | i;
- }
-
- for (i = 0; i < 128; i++) {
- u8 b3;
- u8 b2;
- u8 b1;
- u8 b0;
-
- b3 = (gpr_b[i] >> 24) & 0xff;
- b2 = (gpr_b[i] >> 16) & 0xff;
- b1 = (gpr_b[i] >> 8) & 0xff;
- b0 = gpr_b[i] & 0xff;
-
- /* immed[@bi, (b1 << 8) | b0] */
- /* 11110000 0000VVVV VVVV001I IIIIII11 VVVVVVVV */
- ucode[offset++] = 0xf0;
- ucode[offset++] = (b1 >> 4);
- ucode[offset++] = (b1 << 4) | 0x02 | (i >> 6);
- ucode[offset++] = (i << 2) | 0x03;
- ucode[offset++] = b0;
-
- /* immed_w1[@bi, (b3 << 8) | b2] */
- /* 11110100 0100VVVV VVVV001I IIIIII11 VVVVVVVV */
- ucode[offset++] = 0xf4;
- ucode[offset++] = 0x40 | (b3 >> 4);
- ucode[offset++] = (b3 << 4) | 0x02 | (i >> 6);
- ucode[offset++] = (i << 2) | 0x03;
- ucode[offset++] = b2;
- }
-
- /* ctx_arb[kill] */
- ucode[offset++] = 0xe0;
- ucode[offset++] = 0x00;
- ucode[offset++] = 0x01;
- ucode[offset++] = 0x00;
- ucode[offset++] = 0x00;
-}
-
-static int set_initial_registers(int uengine, struct ixp2000_uengine_code *c)
-{
- int per_ctx_regs;
- u32 *gpr_a;
- u32 *gpr_b;
- u8 *ucode;
- int i;
-
- gpr_a = kzalloc(128 * sizeof(u32), GFP_KERNEL);
- gpr_b = kzalloc(128 * sizeof(u32), GFP_KERNEL);
- ucode = kmalloc(513 * 5, GFP_KERNEL);
- if (gpr_a == NULL || gpr_b == NULL || ucode == NULL) {
- kfree(ucode);
- kfree(gpr_b);
- kfree(gpr_a);
- return 1;
- }
-
- per_ctx_regs = 16;
- if (c->uengine_parameters & IXP2000_UENGINE_4_CONTEXTS)
- per_ctx_regs = 32;
-
- for (i = 0; i < 256; i++) {
- struct ixp2000_reg_value *r = c->initial_reg_values + i;
- u32 *bank;
- int inc;
- int j;
-
- if (r->reg == -1)
- break;
-
- bank = (r->reg & 0x400) ? gpr_b : gpr_a;
- inc = (r->reg & 0x80) ? 128 : per_ctx_regs;
-
- j = r->reg & 0x7f;
- while (j < 128) {
- bank[j] = r->value;
- j += inc;
- }
- }
-
- generate_ucode(ucode, gpr_a, gpr_b);
- ixp2000_uengine_load_microcode(uengine, ucode, 513);
- ixp2000_uengine_init_context(uengine, 0, 0);
- ixp2000_uengine_start_contexts(uengine, 0x01);
- for (i = 0; i < 100; i++) {
- u32 status;
-
- status = ixp2000_uengine_csr_read(uengine, ACTIVE_CTX_STS);
- if (!(status & 0x80000000))
- break;
- }
- ixp2000_uengine_stop_contexts(uengine, 0x01);
-
- kfree(ucode);
- kfree(gpr_b);
- kfree(gpr_a);
-
- return !!(i == 100);
-}
-
-int ixp2000_uengine_load(int uengine, struct ixp2000_uengine_code *c)
-{
- int ctx;
-
- if (!check_ixp_type(c))
- return 1;
-
- if (!(ixp2000_uengine_mask & (1 << uengine)))
- return 1;
-
- ixp2000_uengine_reset(1 << uengine);
- ixp2000_uengine_set_mode(uengine, c->uengine_parameters);
- if (set_initial_registers(uengine, c))
- return 1;
- ixp2000_uengine_load_microcode(uengine, c->insns, c->num_insns);
-
- for (ctx = 0; ctx < 8; ctx++)
- ixp2000_uengine_init_context(uengine, ctx, 0);
-
- return 0;
-}
-EXPORT_SYMBOL(ixp2000_uengine_load);
-
-
-static int __init ixp2000_uengine_init(void)
-{
- int uengine;
- u32 value;
-
- /*
- * Determine number of microengines present.
- */
- switch ((ixp2000_reg_read(IXP_PRODUCT_ID) >> 8) & 0x1fff) {
-#ifdef CONFIG_ARCH_IXP2000
- case 0: /* IXP2800 */
- case 1: /* IXP2850 */
- ixp2000_uengine_mask = 0x00ff00ff;
- break;
-
- case 2: /* IXP2400 */
- ixp2000_uengine_mask = 0x000f000f;
- break;
-#endif
-
-#ifdef CONFIG_ARCH_IXP23XX
- case 4: /* IXP23xx */
- ixp2000_uengine_mask = (*IXP23XX_EXP_CFG_FUSE >> 8) & 0xf;
- break;
-#endif
-
- default:
- printk(KERN_INFO "Detected unknown IXP2000 model (%.8x)\n",
- (unsigned int)ixp2000_reg_read(IXP_PRODUCT_ID));
- ixp2000_uengine_mask = 0x00000000;
- break;
- }
-
- /*
- * Reset microengines.
- */
- ixp2000_uengine_reset(ixp2000_uengine_mask);
-
- /*
- * Synchronise timestamp counters across all microengines.
- */
- value = ixp2000_reg_read(IXP_MISC_CONTROL);
- ixp2000_reg_wrb(IXP_MISC_CONTROL, value & ~0x80);
- for (uengine = 0; uengine < 32; uengine++) {
- if (ixp2000_uengine_mask & (1 << uengine)) {
- ixp2000_uengine_csr_write(uengine, TIMESTAMP_LOW, 0);
- ixp2000_uengine_csr_write(uengine, TIMESTAMP_HIGH, 0);
- }
- }
- ixp2000_reg_wrb(IXP_MISC_CONTROL, value | 0x80);
-
- return 0;
-}
-
-subsys_initcall(ixp2000_uengine_init);