mips: octeon: cpu.c: Implement configure_lmtdma_window()

Import configure_lmtdma_window from Marvell 2013 U-Boot as it's needed
for network functionality.

Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/arch/mips/mach-octeon/cpu.c b/arch/mips/mach-octeon/cpu.c
index fffd9dfb858023207335731337d3222095e15826..1bdc6cd72903bcbe4af75576337df3a3c26c1a7c 100644 (file)
--- a/arch/mips/mach-octeon/cpu.c
+++ b/arch/mips/mach-octeon/cpu.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright (C) 2020 Marvell International Ltd.
+ * Copyright (C) 2020-2022 Marvell International Ltd.
  */
 
 #include <dm.h>
@@ -17,6 +17,8 @@
 #include <mach/cvmx-bootmem.h>
 #include <mach/cvmx-regs.h>
 #include <mach/cvmx-sata-defs.h>
+#include <mach/octeon-model.h>
+#include <mach/octeon-feature.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -393,6 +395,33 @@ static int init_bootcmd_console(void)
        return ret;
 }
 
+static void configure_lmtdma_window(void)
+{
+       u64 tmp;
+       u64 addr;
+       u64 end_addr;
+
+       CVMX_MF_CVM_MEM_CTL(tmp);
+       tmp &= ~0x1ffull;
+       tmp |= 0x104ull;
+
+       /* enable LMTDMA */
+       tmp |= (1ull << 51);
+       /* configure scratch line 2 for LMT */
+       /* TODO: reserve this scratch line, so that others will not use it */
+       /* TODO: store LMTLINE in global var */
+       tmp |= (CVMX_PKO_LMTLINE << 45);
+       /* clear LMTLINE in scratch */
+       addr = CVMX_PKO_LMTLINE * CVMX_CACHE_LINE_SIZE;
+       end_addr = addr + CVMX_CACHE_LINE_SIZE;
+
+       while (addr < end_addr) {
+               *CASTPTR(volatile u64, addr + CVMX_SCRATCH_BASE) = (u64)0;
+               addr += 8;
+       }
+       CVMX_MT_CVM_MEM_CTL(tmp);
+}
+
 int arch_early_init_r(void)
 {
        int ret;
@@ -405,6 +434,9 @@ int arch_early_init_r(void)
        if (ret)
                return ret;
 
+       if (octeon_has_feature(OCTEON_FEATURE_PKO3))
+               configure_lmtdma_window();
+
        return 0;
 }