From 71c199c81d290b2077ee7cf5400332a342de3a97 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Mon, 25 May 2015 14:21:04 +0100 Subject: [PATCH] mips_malta: provide ememsize env variable to kernels Commit 94c2b6aff43c (mips_malta: support up to 2GiB RAM) provided support for using over 256MB of RAM with the MIPS Malta board, including capping the memsize variable that QEMUs pseudo-bootloader provides to the kernel at 256MB in order to match YAMON. It didn't however provide the ememsize variable which kernels supporting memory outside of the unmapped address spaces (ie. EVA or highmem) may use to determine the true size of the RAM present in the system. Set ememsize to the size of RAM so that such kernels may use all available memory without the user having to manually specifying its size & location. Signed-off-by: Paul Burton Cc: Aurelien Jarno Cc: Leon Alrae Reviewed-by: Leon Alrae Reviewed-by: Aurelien Jarno Signed-off-by: Leon Alrae --- hw/mips/mips_malta.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c index 5140882c00..786a8f0638 100644 --- a/hw/mips/mips_malta.c +++ b/hw/mips/mips_malta.c @@ -97,7 +97,7 @@ typedef struct { static ISADevice *pit; static struct _loaderparams { - int ram_size; + int ram_size, ram_low_size; const char *kernel_filename; const char *kernel_cmdline; const char *initrd_filename; @@ -641,8 +641,8 @@ static void write_bootloader (CPUMIPSState *env, uint8_t *base, stl_p(p++, 0x34a50000 | (ENVP_ADDR & 0xffff)); /* ori a1, a1, low(ENVP_ADDR) */ stl_p(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */ stl_p(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff)); /* ori a2, a2, low(ENVP_ADDR + 8) */ - stl_p(p++, 0x3c070000 | (loaderparams.ram_size >> 16)); /* lui a3, high(ram_size) */ - stl_p(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff)); /* ori a3, a3, low(ram_size) */ + stl_p(p++, 0x3c070000 | (loaderparams.ram_low_size >> 16)); /* lui a3, high(ram_low_size) */ + stl_p(p++, 0x34e70000 | (loaderparams.ram_low_size & 0xffff)); /* ori a3, a3, low(ram_low_size) */ /* Load BAR registers as done by YAMON */ stl_p(p++, 0x3c09b400); /* lui t1, 0xb400 */ @@ -851,8 +851,10 @@ static int64_t load_kernel (void) } prom_set(prom_buf, prom_index++, "memsize"); - prom_set(prom_buf, prom_index++, "%i", - MIN(loaderparams.ram_size, 256 << 20)); + prom_set(prom_buf, prom_index++, "%u", loaderparams.ram_low_size); + + prom_set(prom_buf, prom_index++, "ememsize"); + prom_set(prom_buf, prom_index++, "%u", loaderparams.ram_size); prom_set(prom_buf, prom_index++, "modetty0"); prom_set(prom_buf, prom_index++, "38400n8r"); @@ -1054,7 +1056,8 @@ void mips_malta_init(MachineState *machine) } /* Write a small bootloader to the flash location. */ - loaderparams.ram_size = ram_low_size; + loaderparams.ram_size = ram_size; + loaderparams.ram_low_size = ram_low_size; loaderparams.kernel_filename = kernel_filename; loaderparams.kernel_cmdline = kernel_cmdline; loaderparams.initrd_filename = initrd_filename;